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

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 1: The leopard is _________ the threat of extinction.

A. in

B. on

C. under

D. below

Câu 2: No one could ever accuse this government ...... about the poor.

A. not caring

B. of not caring

C. for not caring

D. not to care

Câu 3: After she ________ hospital, she had a long holiday.

A. leaves

B. is leaving

C. had left

D. has left

Câu 4: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built

Câu 5: Laura reminded her roommate ...... her alarm clock for 6:00.

A. to set

B. setting

C. to be set

D. of setting

Câu 6: The ...... friendly products are designed not to harm the natural environment.

A. environment

B. environmental

C. environmentally

D. environmentalism