Câu hỏi: A sign warned motorists ______ dangers.

A. of

B. for

C. about

D. a and c

Câu 1: Don't shout ___________ the child when he makes a mistake.

A. out

B. up

C. down

D. at

Câu 2: How long have they been working _____________ the company?

A. for

B. at

C. in

D. on

Câu 3: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of

Câu 4: Why don't you ask_____________ a pay increase?

A. for

B. by

C. to

D. with

Câu 5: Smoking is harmful _____________ our health.

A. to

B. by

C. against

D. with

Câu 6: Many of the stories are based______________ rumor.

A. on

B. by

C. to

D. with