Câu hỏi: A sign warned motorists ______ dangers.

A. of

B. for

C. about

D. a and c

Câu 1: Why don't you ask_____________ a pay increase?

A. for

B. by

C. to

D. with

Câu 2: We congratulate you ___________ your successful flight.

A. on

B. about

C. by

D. with

Câu 3: Ed depends ________ his family for financial support.

A. on

B. in

C. of

D. at

Câu 4: China became the third country in the world to be able to independently carry __________ manned space flights.

A. by

B. up

C. on

D. out

Câu 5: She was very surprised ________ the grade she received.

A. at

B. on

C. of

D. about

Câu 6: He wore a hat, which made him look _______________ a spy.

A. like

B. up

C. after

D. back