Câu hỏi: A sign warned motorists ______ dangers.

A. of

B. for

C. about

D. a and c

Câu 1: If you look __________ the book, you can find what you need.

A. through 

B. up

C. after

D. by

Câu 2: Jane doesn’t spend much money ______ clothes.

A. over

B. about

C. at

D. on

Câu 3: Mary always take good care__________ her children.

A. off

B. of

C. by

D. with

Câu 4: Don't shout ___________ the child when he makes a mistake.

A. out

B. up

C. down

D. at

Câu 5: He was in orbit around the Earth __________ a speed of more than 17,000 miles per hour.

A. at

B. in

C. by

D. on

Câu 6: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of