Câu hỏi: He didn't know how to swim until he was 30.

A. It was not until he was 30 that he knew how to swim.

B. He knew how to swim after his 30s.

C. It took him 30 years to know how to swim.

D. He still didn't know how to swim until his 30s.

Câu 1: I last saw Bob when I was in Ho Chi Minh City.

A. I didn't see Bob since I was in Ho Chi Minh City.

B. I could see Bob if I was in Ho Chi Minh City.

C. I haven't seen Bob since I was in Ho Chi Minh City.

D. When I was in Ho Chi Minh City, I saw Bob.

Câu 2: It was so late that nothing could be done.

A. It was too late for nothing to be done.

B. It was too late for anything to be done.

C. It was such late that nothing could be done.

D. It was so late that nothing to be done.

Câu 3: The leader went so fast. No one could keep up with him.

A. If only the leader had gone faster.

B. What a fast leader!

C. If the leader hadn’t gone so fast, we could have kept up with him.

D. I wish the leader could not have kept up with us.

Câu 4: People say Chinese food is the best in the world.

A. Chinese food is said to be the best in the world.

B. I agree that Chinese food is the best in the world.

C. Chinese food is eaten all over the world.

D. No food in the world is eaten as much as Chinese food.

Câu 5: An electrical fault could have caused the fire.

A. An electrical fault could have been caused by the fire.

B. An electrical fault could have caused the fire.

C. The fire could have caused an electrical fault.

D. The fire could have been caused by a electrical fault.

Câu 6: If I won a big prize in a lottery, I'd give up my job.

A. Although I won the lottery, I gave up my job.

B. Were I to win the lottery, I gave up my job.

C. Unless I won the lottery, I gave up my job.

D. Had I won the lottery, I gave up my job.