Câu hỏi: The police questioned all guests. They……………….that one of them was a spy.

A. wondered 

B. surprised 

C. challenged

D. suspected

Câu 1: Einstein's …….is really too difficult for the average people to understand. 

A. explanation

B. knowledge

C. experiment

D. theory

Câu 2: The decision was……….until a later meeting. 

A. cancelled

B. arranged

C. postponed

D. moved

Câu 3: Mary: How often do you go hiking?

A. Most weekends

B. I go with three friends.

C. We stay for a weekend.

D. I often go hiking with my family.

Câu 4: She didn't ……….doing the ironing, as she didn't want to go out anyway.

A. object

B. matter

C. refuse 

D. mind

Câu 5: I need some small change to……..the porter. 

A. dip

B. chip

C. sip

D. tip

Câu 6: The elevator isn't running now. It must be….order. 

A. out of

B. for

C. into 

D. behind