Câu hỏi: What time did they arrive .... London?

A. at

B. on

C. in

D. to

Câu 1: Every student should spend .......... least two hours on his homework every night.

A. at

B. for

C. of

D. the

Câu 2: She likes to go .......... a picnic.

A. for

B. on

C. for and on are correct

D. by

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

A. in

B. from

C. on

D. to

Câu 4: She burst .......... tears.

A. out of

B. into

C. for

D. in

Câu 5: She smiled .......... him.

A. at

B. with

C. to

D. about

Câu 6: I work hard .......... help my family.

A. so as to

B. in order to

C. in order that

D. a and b