Câu hỏi: A sign warned motorists ______ dangers.

A. of

B. for

C. about

D. a and c

Câu 1: It was very nice__________ him to give me a lift.

A. of

B. by

C. to

D. on

Câu 2: She was very upset ________ the news of her father’s death.

A. at

B. by

C. with

D. about

Câu 3: She always takes good care _______ her children.

A. for

B. in

C. of

D. with

Câu 4: She was very surprised ________ the grade she received.

A. at

B. on

C. of

D. about

Câu 5: You should make use___________ the books you have.

A. of

B. by

C. to

D. up

Câu 6: We congratulate you ___________ your successful flight.

A. on

B. about

C. by

D. with