Câu hỏi: Don't you think you should try to be friendly ... your classmates?

A. to

B. of

C. with

D. by

Câu 1: We have to apply effective measures to save many plant and animal species ........ extinction.

A. from

B. in

C. for

D. on

Câu 2: I'm very grateful .......... her ......... help.

A. to / of

B. in / for

C. to / with

D. to / for

Câu 3: Henry was born ........ 1992.

A. on

B. in

C. at

D. of

Câu 4: Clean air is necessary ........... our health.

A. to

B. for

C. on

D. with

Câu 5: Clearing forests for timber has resulted ....... the loss of biodiversity.

A. with

B. at

C. in

D. for

Câu 6: She was sad because he was rude ... her.

A. with

B. about

C. for

D. to