Câu hỏi: What about ___________ the solution together this afternoon?

A. find

B. finding

C. to find

D. to finding

Câu 1: People are destroying the air by adding ...... to it.

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 2: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built

Câu 3: Let’s _________ water by turning off tapes when not using.

A. save

B. to save

C. saving

D. saved

Câu 4: Laura reminded her roommate ...... her alarm clock for 6:00.

A. to set

B. setting

C. to be set

D. of setting

Câu 5: The boy found a wallet in the street, and then he ...... to return it to the loser.

A. tried

B. had tried

C. was trying

D. had been trying

Câu 6: Deforestation _________ destroying Earth’s plant and animal variety.

A. are

B. be

C. is

D. being