Câu hỏi: People are destroying the air by adding ...... to it.

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 1: She glanced briefly ________ his lapel badge.

A. in

B. on

C. at

D. up

Câu 2: The campaign will hopefully ensure the survival ...... the tiger.

A. of

B. for

C. to

D. on

Câu 3: I would like to send these letters …………………..air mail.

A. in

B. with

C. by

D. over

Câu 4: Deforestation _________ destroying Earth’s plant and animal variety.

A. are

B. be

C. is

D. being

Câu 5: I don't remember ...... of the decision to change the company policy on vacations. When was it decided?

A. telling

B. being told

C. to tell

D. to be told

Câu 6: Laura reminded her roommate ...... her alarm clock for 6:00.

A. to set

B. setting

C. to be set

D. of setting