Câu hỏi: The elevator isn't running now. It must be….order. 

A. out of

B. for

C. into 

D. behind

Câu 1: The rivers can be…………..by chemicals. 

A. poisonous 

B. contaminated

C. flooded

D. polluting

Câu 2: She didn't ……….doing the ironing, as she didn't want to go out anyway.

A. object

B. matter

C. refuse 

D. mind

Câu 3: We don't sell foreign newspapers because there is no……….for them.

A. request

B. claim

C. suggest

D. ask

Câu 4: Can you see the man ______ is sitting at that table?

A. whose

B. who

C. whom

D. which

Câu 5: Einstein's …….is really too difficult for the average people to understand. 

A. explanation

B. knowledge

C. experiment

D. theory

Câu 6: The man ______ car we bought was from Texas.

A. which

B. why

C. where

D. whose