Câu hỏi: I'd have bought Sam's car if I'd known he was selling it. 

A. I knew Sam wanted to sell his car.

B. I didn't buy Sam's car because I didn't know he was selling it.

C. I bought the car without knowing it was Sam's.

D. I'll buy the car as soon as Sam decides to sell it.

Câu 1: It was thought that the accident was caused by human error. 

A. People think that human error causes the accident. 

B. The accident was thought to be caused by human error. 

C. The accident is thought to cause human error

D. People thought that the accident is caused by human error. 

Câu 2: How long is it since they bought the house?. 

A. When will they buy the house? 

B. When did they buy the house?

C. How long was the house built?

D. When can they build the house?

Câu 3: My mother never allows me to go out alone at night. 

A. I was not allowed to go out at night with my friends.

B. My mother never goes out with me at night.

C. My mother never lets me go out alone at night. 

D. According to my mother, going out alone at night is what I should do.

Câu 4: Nancy isn't used to walking so far. 

A. Nancy isn't accustomed to walking so far.

B. Nancy doesn’t like walking so far.

C. Nancy used to walk further. 

D. Nancy often walks such a long way.

Câu 5: He survived the operation thanks to skilful surgery.

A. He survived because he was a skilful surgeon. 

B. Without skilful surgery, he would have died.

C. Because skilful surgery, he survived the operation

D. He died after the operation. 

Câu 6: By next Friday, Sam……….five speeches. 

A. gives 

B. will give

C. will have given

D. has given