Câu hỏi: Our study is very important____________ our future and useful_____________ our country.

A. for/ for

B. to/ to

C. for/ to

D. to/ for

Câu 1: Mary always take good care__________ her children.

A. off

B. of

C. by

D. with

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

A. of

B. by

C. to

D. on

Câu 3: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of

Câu 4: Most of the streets were named __________ national heroes.

A. after

B. with

C. by

D. up

Câu 5: She was very upset ________ the news of her father’s death.

A. at

B. by

C. with

D. about

Câu 6: A sign warned motorists ______ dangers.

A. of

B. for

C. about

D. a and c