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

A. at

B. on

C. of

D. about

Câu 1: Do you believe _______ ghosts?

A. no preposition

B. in

C. on

D. at

Câu 2: How long have they been working _____________ the company?

A. for

B. at

C. in

D. on

Câu 3: Don't shout ___________ the child when he makes a mistake.

A. out

B. up

C. down

D. at

Câu 4: The pens made___________ plastic are very cheap.

A. by

B. with

C. of

D. to

Câu 5: We congratulate you ___________ your successful flight.

A. on

B. about

C. by

D. with

Câu 6: Mary always take good care__________ her children.

A. off

B. of

C. by

D. with