5.　　 Mary failed to pass the exam.

4.　　 Are you going to the cinema with us?

3.　　 I think Mary should study with friends.

2.　　 We have many rules at school.

1.　　 Children should drive cars.

20.My teachers sometimes give me _____my study.

A.a advice on　 B.some advice on　

C.some adcives of　 D.many advice at

19.He doesn’t know_____.

　 A. to do what　 B.to do how　 C.what to do　 D.how to do

18.I _____there by bike if it is fine tomorrow.

　 A. would go　 B.will go　 C.will go to　 D.would go to

17.If I were rich ,I _____anything you wanted.

　 A. would buy　　 B.will buy　　 C.buy　　 D.would to buy

16.I can’t decide ______.

　 A. to buy which sweater　　　 B.buy which sweater

　 C.which sweater to buy　　　 D.buying which sweater