Câu hỏi: 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 1: The panda's ...... habitat is the bamboo forest.

A. nature

B. natural

C. naturalized

D. naturally

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

A. of

B. for

C. to

D. on

Câu 3: 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 4: Could you please provide us ……………..some more modern equipment?

A. for

B. by

C. in

D. with

Câu 5: The ...... friendly products are designed not to harm the natural environment.

A. environment

B. environmental

C. environmentally

D. environmentalism

Câu 6: What about ___________ the solution together this afternoon?

A. find

B. finding

C. to find

D. to finding