Câu hỏi: Some of the participating schools have also decided to use green cleaning products, which are safer since they do not ……. harmful chemicals into the environment.

A. release

B. expose

C. compound

D. deplete

Câu 1: The boy waved his hands to his mother, who was standing at the school gate, to ………….. her attention.

A. attract

B. pull

C. follow

D. tempt

Câu 2: When you see your teacher approaching you, a slight wave to attract his attention is appropriate.

A. coming nearer to

B. pointing at

C. looking up to

D. catching sight of

Câu 3: The computer has had an enormous _________ on the way we work.

A. alteration

B. change

C. impression

D. influence

Câu 4: Billy, come and give me a hand with cooking.

A. help

B. prepared

C. be busy

D. attempt

Câu 5: Do you know how many countries __________ part in the sporting event?

A. take

B. make

C. have

D. do

Câu 6: He is one of the most ………. bosses I have ever worked with. He behaves rudely to not only me but also others in the staff.

A. thoughtful

B. impolite

C. attentive

D. communicative