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

A. of

B. for

C. to

D. on

Câu 1: What about ___________ the solution together this afternoon?

A. find

B. finding

C. to find

D. to finding

Câu 2: It is possible for local wildlife to coexist ...... industry.

A. to

B. of

C. in

D. with

Câu 3: I would like to send these letters …………………..air mail.

A. in

B. with

C. by

D. over

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

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 5: The two children blamed each other ...... the window.

A. to break

B. breaking

C. for breaking

D. having broken

Câu 6: The leopard is _________ the threat of extinction.

A. in

B. on

C. under

D. below