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

A. for

B. by

C. to

D. with

Câu 1: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of

Câu 2: The pens made___________ plastic are very cheap.

A. by

B. with

C. of

D. to

Câu 3: Jane doesn’t spend much money ______ clothes.

A. over

B. about

C. at

D. on

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: Ken prefers Chinese food________ French food.

A. to

B. or

C. and

D. with

Câu 6: Our study is very important____________ our future and useful_____________ our country.

A. for/ for

B. to/ to

C. for/ to

D. to/ for