24.Ann is so careful that shealways goes over her exercises to____there are no mistakes

A.look for　 B.make sure C.find out　 D.think about

23.--Do you mind if I sit here?

　　 -____.It's for Mr Brown.

　A.Not at all　　　　 B.Never mind

　C.better not　　　　 D.Of couse not

22.--Today or tomorrow?

　 -What are you talking about?

　 -We are talking about____to give a talk on WTO.

　　 A.how　　　 B.where　　 C.when　　　 D.what

21.--The exam was very easy,wasn't it?

　　 -Yes,but I don't think____could pass it.

　 A.somebody　　 B.anybody　 C.nobody　 D.everybody

20.Would you please say it____?I still can't follow you.

　A.loudly　　　 B.slowly C.more loudly　 D.more slowly

19.If you like the chicken,you may have as____as you can.

　A.much　　 B.many　　　 C.more　　　 D.little

18.Be careful,Jane.Don't_____your hands dirty.

　A.get　　　 B.keep　　　 C.have　　　 D.let

17.--Excuse me.Could you tell me_____get to the plane?

　 - Certainly.Go straight along here.

　A.how can we　　　 B.hwo we can

　C.when can we　　　 D.when we can

16. -What about having a cup of tea?

　　 -_____.

　A.I want it　　 B. Help yourself　 C. Good idea D .Me, too

15.- What did Mr Jones do before he moved here?

　 -He ____a city bus for over twenty-five years.

　 A. is driving　 B. drove　　 C. has driven　 D. drives