Câu hỏi: We spent about one-third of our lives sleeping. We know relatively little about sleep.

A. We know relatively little about sleep, as a result, we spend about one-third of our lives sleeping.

B. We shall know more about sleep if we spend more than one-third of our lives sleeping.

C. We spend about one-third of our lives sleeping so that we know relatively little about sleep.

D. Despite spending about one-third of our lives sleeping, we know relatively little about sleep.

Câu 1: Unless we protect the environment, our life will be badly affected.

A. If our life is badly affected, we will protect the environment.

B. If we protect the environment, our life will be badly affected.

C. If we don’t protect the environment, our life won’t be badly affected.

D. If we don’t protect the environment, our life will be badly affected.

Câu 2: Tim graduated with a good degree. He joined the ranks of the unemployed.

A. Tim joined the ranks of the unemployed because he graduated with a good degree.

B. If Tim graduated with a good degree, he would join the ranks of the unemployed.

C. Though Tim graduated with a good degree, he joined the ranks of the unemployed.

D. That Tim graduated with a good degree helped him join the ranks of the unemployed.

Câu 3: Peter told us about his leaving the school. He did it on his arrival at the meeting.

A. Only after his leaving the school did Peter inform us of his arrival at the meeting.

B. Not until Peter told us that he would leave the school did he arrive at the meeting.

C. Hardly had Peter informed us about his leaving the school when he arrived at the meeting.

D. No sooner had Peter arrived at the meeting than he told us about his leaving the school.

Câu 4: Harry no longer smokes a lot.

A. Harry now smokes a lot.

B. Harry used to smoke a lot.

C. Harry didn’t use to smoke a lot.

D. Harry rarely smoked a lot.

Câu 5: Had she read the reference books, she would have been able to finish the test.

A. If she had read the reference books, she could finish the test.

B. Because she read the reference books, she was able to finish the test.

C. Although she didn't read the reference books, she was able to finish the test.

D. Not having read the reference books, she couldn't finish the test.

Câu 6: We survived that accident because we were wearing our seat belts.

A. If we weren't wearing our seat belts, we couldn't have survived that accident.

B. But for our seat belts, we would have survived that accident.

C. Had we not been wearing our seat belts, we wouldn't have survived that accident.

D. Without our seat belts, we could have survived that accident.