Câu hỏi: The panda's ...... habitat is the bamboo forest.

A. nature

B. natural

C. naturalized

D. naturally

Câu 1: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built

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

A. of

B. for

C. to

D. on

Câu 4: People are destroying the air by adding ...... to it.

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 5: The leopard is _________ the threat of extinction.

A. in

B. on

C. under

D. below

Câu 6: I threw my old trainers and bought some new .................. .

A. ones

B. one

C. some

D. any