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

A. in

B. on

C. under

D. below

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

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 2: 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 3: Express Money Transfer is one of the quickest ways ……..help us to send money.

A. who

B. whose

C. when

D. that

Câu 4: The ...... friendly products are designed not to harm the natural environment.

A. environment

B. environmental

C. environmentally

D. environmentalism

Câu 5: Let’s _________ water by turning off tapes when not using.

A. save

B. to save

C. saving

D. saved

Câu 6: It is possible for local wildlife to coexist ...... industry.

A. to

B. of

C. in

D. with