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: When the unemployment rate is high, the crime rate is usually also high.

A. The unemployment rate and the crime rate are both high.

B. The unemployment rate is as high as crime rate.

C. The high rate of unemployment depends on the high rate of crime.

D. The higher unemployment rate is, the higher crime rate is.

Câu 3: 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 4: They are building a new highway around the city.

A. Around the city a new highway is being built.

B. A new highway is being built around the city.

C. A new highway is being built around the city by them

D. A new highway around the city is being built.

Câu 5: They are going to hold next year's congress in San Francisco.

A. Congress is going to be held next year in San Francisco.

B. Congress in San Francisco is going to be held next year.

C. Next year's congress is going to be held by them held next year.

D. Next year's congress is going to be held in San Francisco.

Câu 6: 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.