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

A. for

B. at

C. in

D. on

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

A. of

B. by

C. to

D. on

Câu 2: Mary always take good care__________ her children.

A. off

B. of

C. by

D. with

Câu 3: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of

Câu 4: Ken prefers Chinese food________ French food.

A. to

B. or

C. and

D. with

Câu 5: How would the body react__________ the extreme changes in temperature?

A. by

B. to

C. with

D. about

Câu 6: I think your mother should let you make___________ your own mind.

A. down

B. to

C. up

D. of