Câu hỏi: We’ll buy a smaller house whenthe children have grown____________ and left home.

A. to

B. up

C. at

D. for

Câu 1: We areall aware____________ the importance of the environment protection.

A. of

B. about

C. to

D. of

Câu 2: If there was a technical failure, Gagarin might never get __________ to the Earth.

A. to

B. back

C. from

D. down

Câu 3: We were very grateful _________ our friends for all of their assistance.

A. to

B. for

C. off

D. with

Câu 4: It was not a problem. We looked____________ his number in the telephone book.

A. up

B. for

C. to

D. after

Câu 5: If you don’t pay attention_________ the teacher, you won’t understand the lesson.

A. for

B. to

C. at

D. about

Câu 6: The river Rhine flows _____ the North sea.

A. to

B. into

C. in

D. for