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

A. for

B. at

C. in

D. on

Câu 1: Most of the streets were named __________ national heroes.

A. after

B. with

C. by

D. up

Câu 2: She always takes good care _______ her children.

A. for

B. in

C. of

D. with

Câu 3: Mary always take good care__________ her children.

A. off

B. of

C. by

D. with

Câu 4: If you look __________ the book, you can find what you need.

A. through 

B. up

C. after

D. by

Câu 5: Jane doesn’t spend much money ______ clothes.

A. over

B. about

C. at

D. on

Câu 6: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of