Câu hỏi: John has gone away. He’ll be back ......... a week.

A. on

B. at

C. in

D. for

Câu 1: What have you got ......... your mouth?

A. at

B. in

C. on

D. of

Câu 2: The train service is very good. The trains are nearly always .............. time.

A. for

B. at

C. on

D. in

Câu 3: You’ve got a dirty mark ............... your cheek. Have a look ........... the mirror.

A. at - on

B. on - in

C. on - on

D. at - at

Câu 4: Look at the leaves ............. that tree. They’re ........... a beautiful colour.

A. in - in

B. of - at

C. at - at

D. on — in

Câu 5: Here’s a shopping list. Don’t buy anything that’s not ............. the list.

A. on

B. at

C. in

D. of

Câu 6: We hadn’t arranged to meet. We met ...........

A. on change

B. by change 

C. by opportunity

D. for opportunity