Câu hỏi: Some large cities may have to ban cars.... the city center to wipe out smoke.

A. of

B. from

C. to

D. with

Câu 1: I work hard .......... help my family.

A. so as to

B. in order to

C. in order that

D. a and b

Câu 2: I shall be ready .......... a moment.

A. for

B. in

C. with

D. on

Câu 3: .......... the past, people did a great deal of work by hand.

A. in

B. from

C. on

D. to

Câu 4: .......... mistake, I took the wrong book from my desk this morning.

A. Through

B. By

C. With

D. In

Câu 5: Did you go on holiday ... yourself?

A. by

B. on

C. to

D. of

Câu 6: She likes to go .......... a picnic.

A. for

B. on

C. for and on are correct

D. by