Đề trắc nghiệm ôn thi môn Tiếng Anh Lớp 12 - Practice 1,2

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PRACTICE 1
Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
Question 1: A. helps 	 B. cleans 	C. plays	D. runs
Question 2: A. dream	 B. mean	 C. peace	D. head
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
Question 3: A. prefer	 B. repair	C. borrow	D. allow
Question 4. A. comfortable	B. excellent	C. attractive 	D. confident
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Question 5. You are thirsty, __________? 
	A. don't you	B. aren't you	C. are you	D. are not you
Question 6: This is ___________ first time I have ever eaten this food.
 	A.a	B. the	C. an	D. no article
Question 7: Don't you think you should apply for the job _____ writing?
	A. with 	 B. for 	C. at 	D. in
Question 8: We all enjoy _________English.
A. learn	B. to learn	C. learning	D. learned
Question 9: If my husband __________ here now, He would help me to look after my sons
A.were 	B. is	C. will be	D. would be 
Question 10: She has not written to me since we _____________ last time. 
	A. met 	B. to meet 	C. will meet 	D. was meeting 
Question 11: She didn’t walk home by herself _______ she knew that it was dangerous.
	A. because of	B. because 	C. despite 	D. although
Question 12: He will take the dog out for a walk ________________.
A. as soon as he finishes	B. when I was finishing dinner
C. until I finished dinner	D. shall have finished
Question 13: My favourite hobby is watching the work ______________ by ShakeSpeare in the 20 century.
A. written	B. is writing 	C. writes	D. is written 
Question 14: A new policy with regard to our country’s _______ development has been adopted.
A. industrialize	B. industrially	C. industry	D. industrial
Question 15: Children may be punished for not _______ their toys after playing.
 A. giving away	B. putting away	C. putting off	D. giving off
Question 16: You'd better _____________ a commitment to being a volunteer on a regular basis.
A. promise 	B. do 	C. make 	D. pull
Question 17: The _____ for this position starts at thirty thousand euros per year.
A. wage 	B. pension 	C. salary 	D. income
Question 18. If you ______ too much on study, you will get tired and stressed.
A. concentrate 	B. develop 	C. organize 	D. complain
Question 19: Since he started his own business he has been making money hand over ________.
A. fist	B. heel 	C. head	D. palm
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSES T in meaning to the underlined word (s) in each of the following questions.
Question 20: : One of the biggest issues that many victims of negligent behavior encounter is difficulty in determining whether or not an action had happened forseeably.
A. predictably B. computably	 C. unpredictably	 D. ascertainably
Question 21: We can use either verbal or non – verbal forms of communication.
 A. using gesture	B. using speech	 C. using verbs	D. using facial expressions
Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
Question 22 After five days on trial, the court found him innocent of the crime and he was released.
 A. benevolent 	 B. innovative 	 C. naive	 D. guilty
Question 23: She was like a cat on hot bricks before her driving test.
A. nervous	B. comfortable	C. depressed	D. relaxing
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges.
Question 24. Tom is in Ho Chi Minh city and asks a passer-by the way to the railway station. 
- Tom: “Can you show me the way to the railway station, please?” 
- Passer-by: “_______” 
A. No way. 	B. Just round the comer over there.
C. Look it up in a dictionary!	D. There’s no traffic near here.
Question 25. Two students are discussing their previous English class. 
- Student 1. “I think the teacher should give us more exercises.” 
- Student 2. “_______” 
A. Yes, let’s 	B. Ok
C. That’s rubbish 	D. That’s what I was thinking 
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 26 to 30.
Many parents believe that they should begin to teach their children to read when they are slightly more than toddlers. This is fine if the child shows a real (26) _________but forcing a child could be counter-productive if she isn’t ready. Wise parents will have a relaxed attitude and take the lead from their child. What they should provide is a selection of stimulating toys, books and (27)______ activities. Nowadays there is plenty of good material available for young children, and of course, seeing plenty of books in use about the house will also encourage them to read. 
Of course, books are no longer the only source of stories and information. There is also a huge range of videos, (28)______ can reinforce and extend the pleasure a child finds in a book and are (29)______ valuable in helping to increase vocabulary and concentration. Television gets a bad review as far as children are concerned, mainly because too many spend too much time watching programs not intended for their age group. Too many television programs induce an incurious, uncritical attitude that is going to make learning much more difficult. (30)______, discriminating viewing of programs designed for young children can be useful. Just as adults enjoy reading a book after seeing it serialised on telvision, so children will pounce on books which feature their favourite television characters, and videos can add a new dimension to a story known from a book.
Question 26: A. appearance	B. hobby	C. content	D. interest
Question 27: A. other B. every	C. one D. another
Question 28: A. who	B. why	C. when	D. which
Question 29: A. properly	B. worthily	C. equally	D. perfectly
Question 30: A. Therefore	B. Besides	C. However	D. Moreover
Read the following passage and mark the letter A, B, C, D on your answer sheet to indicate the correct answer to each of the following questions.
	Read about some alternative schools of thought 
	One school in Hampshire, UK, offers 24-hour teaching. The children can decide when or if they come to school. The school is open from 7 a.m. to 10 p.m., for 364 days a year and provides online teaching throughout the night. The idea is that pupils don't have to come to school and they can decide when they want to study. Cheryl Heron, the head teacher, said "Some students learn better at night. Some students learn better in the morning." Cheryl believes that if children are bored, they will not come to school. "Why must teaching only be conducted in a classroom? You can teach a child without him ever coming to school."
	Steiner schools encourage creativity and free thinking so children can study art, music and gardening as well as science and history. They don't have to learn to read and write at an early age. At some Steiner schools the teachers can't use textbooks. They talk to the children, who learn by listening. Every morning the children have to go to special music and movement classes called "eurhythmy", which help them learn to concentrate. Very young children learn foreign languages through music and song. Another difference from traditional schools is that at Steiner schools you don't have to do any tests or exams.
	A child learning music with the Suzuki method has to start as young as possible. Even two-year-old children can learn to play difficult pieces of classical music, often on the violin. They do this by watching and listening. They learn by copying, just like they learn their mother tongue. The child has to join in, but doesn't have to get it right. "They soon learn that they mustn't stop every time they make a mistake. They just carry on," said one Suzuki trainer. The children have to practice for hours every day and they give performances once a week, so they learn quickly. "The parents must be involved too," said the trainer, "or it just doesn't work."
	(Source: Adapted from Speak out)
 Question 31. Which of the following is the most suitable title for the paragraph?
	A. Learn by listening	B. Are traditional ways of learning the best? 
	C. Traditional ways of teaching	D. 24-hour teaching
Question 32. Students learning music with Suzuki method_______ .
	A. stop when they make mistakes	B. must learn difficult music
	C. start at an early age 	D. like to learn their mother tongue
Question 33. The word "involved" in paragraph 3 is closest in meaning to_____.
A. encouraged 	B. engaged 	C. accepted 	D. rejected 
 Question 34. The word "this" in paragraph 3 refers to ______.
	A. starting as young as possible	B. the violin
	C. playing difficult pieces of music 	D. learning their mother tongue
 Question 35. Which of the following is TRUE about Steiner schools?
	A. They are different from traditional schools.	B. Students must concentrate on music.
	C. Students have to do exams and tests.	D. Young children are not taught foreign languages.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Marriage nowadays is a choice people make on their own, but this has not always been the case in society. Thousands of years ago, the average lifespan was shorter than it is today. A man usually lived until he was about 40 years old, while women died even sooner because of childbirth. There were many wars and illnesses, and people had to protect themselves by having more children while they were still young. The parents lived through their children.
Marriage was not so much a romantic love story but a business transaction, or deal. Most marriages were arranged between parents while their children were still very young. It was the custom that the fathers made the decision on whom their children were going to marry. The mothers had little say in it since they rarely made any decisions outside the household. The fathers would meet to arrange the wedding date and the money given for the bride on her wedding date. The more money and land a girl had, the more chances she had to marry well. Therefore, it was important that her father choose the bridegroom very well. Usually, it was someone who came from a good family or who was rich too. It was very unlikely that people married outside their social class. A few well-off and rich merchants got to marry poorer noblewomen and became King’s business advisors. In a way, poor peasants had an easier choice as it was less important whom they married.
The practice of arranged marriage is still common in some countries in the Middle East, such as India or Pakistan. Here, social classes are still strongly divided and very well-kept. Often, however, arranged marriages are a sign that people do not want to let go of the past, which gives them comfort and security in an ever-changing world.
(Adapted from Longman Essence Reading, Vol. 2)
Question 36: What does the passage mainly discuss?
A. Marriage as a business transaction today.	B. Mothers' roles in their children's marriage.
C. Marriage practices in modern society.	D. The practice of arranged marriage.
Question 37: The word "it" in paragraph 1 refers to 	.
A. marriage	B. a choice	C. society	D. the average lifespan
Question 38: According to paragraph 1, women died even sooner than men because of 	.
A. wars	B. illnesses	C. childbirth	D. marriage
Question 39: According to paragraph 2, richer girls were more likely to 	.
A. become noblewomen	B. marry well
C. succeed in business D. marry peasants
Question 40: The author mentions all of the following in the passage EXCEPT 	.
A. People tended to marry outside their social class
B. Men made almost all decisions inside the family
C. Marriage used to be a deal between two families
D. The wedding date was decided by the fathers
Question 41: The word "bridegroom" in paragraph 2 is closest in meaning to 	.
A. bridesmaid	B. bride	C. daughter-in-law	D. son-in-law
Question 42: The phrase "let go of" in paragraph 3 mostly means 	.
A. give up	B. turn off	C. save up	D. give in
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Question 43: Each of the nurses report to the operating room when his or her name is called.
A. her name 	B. of the 	C. called	D. report 
Question 44: The Indians of the southwestern United States are famous for their beautiful art work, especially handmade jewelry cast from silver, carved from stones, or decorations with beads and feathers.
A. decorations	B. art work	C. are	D. especially
Question 45: The article infered that the pilot was responsible for the accident.
A. The article	B. inferred	C. the accident	D. responsible for
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
 Question 46: I can’t cook as well as my mother does.
A. My mother can’t cook better than I can.B. I can cook as well as my mother can.
C. My mother can cook better than I do.D. I can cook better than my mother can.
Question 47: “You will have a test tomorrow” said the teacher
A. The teacher said that we would have a test tomorrow.
B. The teacher said that we will have a test tomorrow.
C. The teacher said that we would have a test the following day.
D. The teacher said that we had a test the next day.
Question 48: There was no need for you to have left the house in such weather.
A. You didn't need to leave the house in such weather.
B. You didn't have to leave the house in such weather.
C. You needn't have left the house in such weather.
D. You needn't leave the house in such weather
Choose the correct sentence among A, B, C or D which best combines each pair of sentence.
Question 49: I didn't listen to him. I didn't succeed.
	A. If I listened to him, I would have succeeded.	B. If I had listened to him, I would succeed.
 	C. If I listened to him, I would succeed. D. If I had listened to him, I would have succeeded.
Question 50: She tried very hard to pass the driving test. She could hardly pass it.
A. Despite being able to pass the driving test, she didn't pass it.
B. She tried very hard, so she passed the driving test satisfactorily
C. Although she didn't try hard to pass the driving test, she could pass it.
D. Hard as she tried, she could hardly pass the driving test 
PRACTICE 2
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
Question 1: A. proofs	B. books	C. points	D. days
Question 2: A. time	B. kind	C. milk	D. light
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions
Question 3: A. symbol	B. police	C. letter	D. income
Question 4: A. similar	B. digital	C. interest	D. initial
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Question 5: It isn’t hot today, ______ ?
is it	B. was it	C. does it	D. did it
Question 6: English is spoken all over ______ world.
A. a	B. an	C. the	D. no article
Question 7: She likes reading books ______ the library.
A. in	B. at 	C. on 	D. from
Question 8: Have you ever considered ______ to study in a foreign country?.
A. to go 	B. going 	C. to be going 	D. having gone
Question 9: If I______ in London now, I could visit British Museum.
A. were	B. had been	C. have been	D. would be
Question 10: When I _____ at this house, he was still sleeping
arrived	B. was arriving	C. had arrived	D. has arrived
Question 11: I knew they were talking about me ______ they stopped when I entered the room.
although	B. in spite of	C. because 	D. because of 
Question 12. _______, I will have finished my homework.
A. By the time you return	C. As soon as you return
B. After you return 	D. At the time you return
Question 13: The man _______ his car outside hasn’t come back for it yet.
Whom leaving	B. leaving	C. left	D. to leave
Question 14: : _____ noodles are a precooked and usually dried block invented by Japanese.
A. instanter	B. instance	C. instant 	D. instantly 
Question 15: I wish you would ______ the TV and go outside and get some exercise.
call off	B. give off	C. put off	D. turn off
Question 16: Make sure you _____ your assignment before you go to bed.
have	B. do	C. take	D. make
Question 17 Despite the development of e-books and online reading materials, printed books are still regarded as a wonderful _______ of entertainment.
resource 	B. place 	C. source D. replacement 
Question 18: The ______ of the soil reduced the productivity of the farm
fertility	B. hardship	C. inadequacy	D. poverty
Question 19: William was as ______ a cucumber when the harsh punishment was meted out to him by the judge.
A. cool	B. cold	C. placid	D. impassive
Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
Question 20: She decided to find a job to earn money instead of just living at home and being a housekeeper.
lend	B. make 	C. borrow	D. raise
Question 21: If your smartphone rings in class, it will be very annoying and disruptive.
interruptive	B. supportive	C. discouraging	D. confusing
Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
Question 22: He didn’t seem in the least concerned for her safety
indifferent	B. ready	C. passionate	D. stolen
Question 23: I feel under the weather today. I’m tired and I don’t want to do anything.
A. sick 	 	 	B. happy	C. sad 	 D. healthy
Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.
Question 24: Jane is inviting Mary to have dinner with her. 
 Jane: “I’m having some friends over for dinner this evening. Would you like to join us?” 
 Mary: “__________”
A. As a matter of fact, I do.	B. Can I take a rain check?
C. Come on. It’s your turn.	D. Thanks, but I mustn’t.
Question 25: Mrs. Smith is in a fashion store. 
 Mrs. Smith: “How can this dress be so expensive?”
 The shop assistant: “_________”
A. Yes, it’s the most expensive. 	B. You’re paying for the brand.
C. What an expensive dress. 	D. That’s a good idea 
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 26 to 30. 
GOOD HEALTH
Most people would agree with the definition of good health as being a state where you are fiee from sickness. (26) ______ this, there are many different opinions about how a person can actually have good health. People used to only think of their health (27)_______they were sick. But these days more and more people are taking measures to (28)_______ sure that they don't get sick in the first place.
One of the best things you can do for your body is exercise. But now much is enough? Some people think that doing simple things like cleaning the house is helpful. Other people do heavy exercise every day, for instance, running or swimming. One thing experts do agree on is that any kind of exercise is good for you.
Along with exercise, having a healthy diet can help promote good health. Foods like vegetables and fruit should be eaten several times each day. It is also important to eat foods high in fiber such as beans, grains, fruit and vegetables. Fiber helps your body to (29)_______ the food you eat. It also helps your body in (30) ______ ways such as decreasing the chance of getting some cancers, heart disease and diabetes.
(Source: 
Question 26. A. although 	B. because 	C. despite 	D. due to
Question 27. A. whereas 	B. even if 	C. when 	D. while
Question 28. A. get 	B. make 	C. have 	D. take
Question 29. A. pump	B. consume 	C. spoil 	D. digest
Question 30. A. another	B. each other	C. other	D. others
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 31 to 35.
Deep brain stimulation (DBS), an experimental technology that involves implanting a pacemaker-like device in a patient’s brain to send electrical impulses, is a hotly debated subject in the field of medicine. It is an inherently risky procedure and the exact effects on the human brain aren’t yet fully understood.
But some practitioners believe it could be a way to alleviate the symptoms of depression or even help treat Alzheimer’s — and now they suspect it could help with drug addiction as well. In a world’s first, according to the Associated Press, a patient in Shanghai’s Ruijin Hospital had a DBS device implanted in his brain to treat his addiction to methamphetamine. And the device has had an astonishingly positive effect, the patient says. “This machine is pretty magical. He adjusts it to make you happy and you’re happy, to make you nervous and you’re nervous,” he told the Associated Press. “It controls your happiness, anger, grief and joy.”
Other studies in China have yielded mixed results trying to treat opioid addictions using DBS, according to the AP. In the United States, at least two studies that tried to treat alcoholism with DBS were dropped for not being able to justify the risks. The idea of using DBS to treat drug addiction has raised concerns in medical communities across the globe about brain hemorrhage, seizures, or personality changes.
(Source: http:// futurism.com)
Question 31: What is the passage mainly about?
A. Symptoms of depression	B. Curing addiction
C. Deep brain simulation	D. Brain diseases
Question 32: The word “alleviate” in paragraph 2 is closest in meaning to____________.
A. demolish	B. ease	C. destroy	D. devalue
Question 33: According to the passage, the use of DBS_____________.
A. has been thoroughly studied by scientists.
B. has been approved by all Chinese practitioners.
C. has achieved both positive and negative results.
D. has successfully cured opioid addictions in China.
Question 34: All of the following are mentioned in the passage as concerns about the use of DBS to treat drug addiction in medical communities worldwide EXCEPT______________.
A. Seizures	B. Personality changes
C. Brain hemorrhage	D. Alcoholism
Question 35: The word “It” in paragraph 3 refers to__________________.
A. Deep brain simulation	B. a pacemaker-like device
C. the field of medicine	D. a patient’s brain
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.
More than 200 reindeer have died of starvation on the Norwegian archipelago of Svalbard, with scientists blaming their deaths on climate change. The wild deer carcasses were found on the Arctic islands this summer by researchers from the Norwegian Polar Institute (NPI), which said it had never logged so many deaths at once in 40 years of monitoring the animals’ population level. “It’s scary to find so many dead animals,” project leader Ashild Onvik Pedersen told state broadcaster NRK. “This is an example of how climate change affects nature. It is just sad.”
Svalbard’s capital Longyearbyen, the northernmost town on earth, is thought to be warming quicker than any other settlement on the planet, climate scientists warned earlier this year. The milder temperatures in the region led to unusually heavy rainfall in December, leaving a thick layer of ice when the precipitation froze. This meant the reindeer could not dig through the hardened tundra to reach the vegetation they graze on in their usual pastures, the NPI said. Svalbard’s reindeer have been observed eating seaweed and kelp when food is scarce, but these are less nutritious and cause them stomach problems.
A relatively high number of calves born last year increased the death toll, as the youngest and weakest are often the first to die in harsh conditions. “Some of the mortality is natural because there were so many calves last year. But the large number we see now is due to heavy rain, which is due to global warming,” said Ms Onvik Pedersen.
A team of three scientists spent 10 weeks investigating population of the Svalbard reindeer earlier this year. Researchers warned the decline of reindeer would cause unwanted plant species, currently kept in check by the animals’ grazing, to spread across Arctic ecosystems in Europe, Asia and North America.
Arctic reindeer and caribou populations have declined 56 per cent in the last two decades, a report by the National Oceanic and Atmospheric Administration said last year. The report said food security was partly to blame for falling herd numbers, while warmer summers could also put the animals at greater risk of diseases spread by flies and parasites. The average temperature in Longyearbyen has risen by 3.7C since 1900, more than three times the global average increase of about 1C. In 2016, the entrance to the town’s “Doomsday” seed vault – which stores specimens of almost all the world’s seeds – was flooded following heavy rainfall.
(Adapted from 
Question 36. Which could best serve as the title of the passage?
	A. Climate change – The main cause for the death of hundreds of reindeer.
	B. Global warming – What are the effects on nature?
	C. Reindeer – The most vulnerable animals on the Arctic islands. 
	D. Climate change – What are the reasons? 
Question 37. The word “logged” in paragraph 1 is closest in meaning to ______________.
	A. cut down	B. damaged	C. recorded 	D. discovered 
Question 38. According to Ms. Onvik Pedersen, why is the death rate of reindeer so high this year?
	A. Because of the high number of calves born.	B. Because of heavy rain.
C. Because of natural selection. 	D. Because of the shortage of vegetation.
Question 39. The word “scarce” in paragraph 2 could be best replaced by __________.
	A. inappropriate	B. insufficient	C. abundant 	D. unlimited 
Question 40. What does the word “these” in paragraph 2 refer to?
	A. seaweed and kelp	B. Svalbard’s reindeer	C. their usual pastures 	D. milder temperatures . 
Question 41. Which statement is TRUE according to the last paragraphs?
A. After over 2 months investigated, reindeer populations were reported to decrease because of the increase of unwanted plant species.
	B. Nearly a half of reindeer populations have reduced in the last two decades.
	C. Beside the scarcity of food, diseases are also the cause of reindeer’s mortality. 
	D. The average temperature of the Earth has increased by 3.7C since 1990. 
Question 42. It can be inferred from the passage that ______________.
A. Arctic reindeer play the most important role in the Arctic ecosystems.
B. the Arctic ecosystems are altering worse because of the global warming.
C. the clearest effect of climate change is the limit of food chain in the nature. 
D. the harsh weather in Arctic islands only damages the new-born calves.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Question 43: Most workers seems to be happy with their new working condition.
seems	B. with	C. new	D. condition
Question 44: Children love playing in the mud, run through paddles, and getting very dirty. 
Playing	B. run	C. paddles	D. dirty
Question 45: He’s one of the most bored people I’ve ever met.
	A.one	B. most	C. bored 	D. met 
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions 
Question 46: He drives more carelessly than he used to.
A. He doesn’t drive as carefully as he used to.
B. He doesn’t drive carefully than he used to.
C. He doesn’t drive as carefully than he used to.
D. He doesn’t drive as carefully he does.
Question 47: “I’ll take the children to the park” said the husband to his wife.
The husband asked the wife to take the children to the park.
The husband offered to take the children to the park.
The husband insisted on taking the children to the park.
The husband requested to take the children to the park.
Question 48: It’s possible that we won’t go camping this weekend. 
A. We will probably go camping this weekend. 
B. We will not go camping this weekend. 
C. We may not go camping this weekend. 
D. We must not go camping this weekend
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions
Question 49: She helped us a lot with our project. We couldn't continue without her help. 
	A. Unless we had her contribution, we could continue with the project. 
	B. But for her contribution, we could have continued with the project. 
	C. If she hadn't contributed positively, we couldn't have continued with the project. 
	D. Provided her contribution wouldn't come, we couldn't continue with the project. 
Question 50: They finished one project. They started working on the next.
A. Had they finished one project, they would have started working on the next.
B. Only if they had finished one project did they start working on the next.
C. Hardly had they finished one project when they started working on the next.
D. Not until did they start working