Câu hỏi: Ed depends ________ his family for financial support.

A. on

B. in

C. of

D. at

Câu 1: Smoking is harmful _____________ our health.

A. to

B. by

C. against

D. with

Câu 2: It was very nice__________ him to give me a lift.

A. of

B. by

C. to

D. on

Câu 3: A sign warned motorists ______ dangers.

A. of

B. for

C. about

D. a and c

Câu 4: How long have they been working _____________ the company?

A. for

B. at

C. in

D. on

Câu 5: Why don't you ask_____________ a pay increase?

A. for

B. by

C. to

D. with

Câu 6: He was in orbit around the Earth __________ a speed of more than 17,000 miles per hour.

A. at

B. in

C. by

D. on