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: Twenty five dollars…..too much to pay for that shirt. 

A. have

B. is

C. sound

D. seem 

Câu 3: By next Friday, Sam……….five speeches. 

A. gives 

B. will give

C. will have given

D. has given

Câu 4: I plan to come back to Korean, ………..we had a chance to visit ten years ago. 

A. which

B. where

C. that

D. in which

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: 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.