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: Don't shout ___________ the child when he makes a mistake.

A. out

B. up

C. down

D. at

Câu 2: The pens made___________ plastic are very cheap.

A. by

B. with

C. of

D. to

Câu 3: Do you believe _______ ghosts?

A. no preposition

B. in

C. on

D. at

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

A. for

B. at

C. in

D. on

Câu 5: Smoking is harmful _____________ our health.

A. to

B. by

C. against

D. with

Câu 6: The Americanpeople shared ___________ the Soviet people their satisfaction for the safe flight.

A. by

B. with

C. at

D. about