Câu hỏi: After you have paid a bill, you are given a ………to show that you have paid

A. receive

B. receipt 

C. receiver

D. reception

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

A. poisonous 

B. contaminated

C. flooded

D. polluting

Câu 2: 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 3: He was sacked after having an argument with his boss

A. hit

B. argued 

C. threatened 

D. fired

Câu 4: The decision was……….until a later meeting. 

A. cancelled

B. arranged

C. postponed

D. moved

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 police questioned all guests. They……………….that one of them was a spy.

A. wondered 

B. surprised 

C. challenged

D. suspected