18.-Could you tell me ______ they are going to stay with us?

　---I’m not sure. Maybe for three days.

　 A.how soon　　 B.how often　　 C.how long　　 D.how far

17.Is ______ interesting for us to visit the Visitors’ Center and watch a movie about sharks?

　 A.now　　　 B.there　　　　　 C.that　　　　　 D.it

16. I bought the radio last weekend, but it ______ work now.

　 A.doesn’t　　 B.didn’t　　　　 C.won’t　　 　　　D.isn’t

15. Your room is dirty enough. Would you please ______ it after lunch, Tod?

　 A.sweep　　 　B.relax　　　　 C.improve　　　　 D.check

14. --_______ I have a look at the fashion magazine?

　 --Of course you can. But you must return it to me before school is over.

　 A .Should　　　 B. Must　　　　 C. Could　　　　　 D. May

13.We had fun _________ our bicycles to the beach at the weekend.

　 A.ride　　　 B.to ride　　　 　C.rode　　　 　　D.riding

12.--Was your brother born _______ April , 1985 ?

　-- No, he was born ________ March 2, 1985.

　 A.in, on　　　 B.in, in　　　　　 C.on, in　　　　 D.on, on

11. We have _______ English class every day.

　 A. a　　　　　 B. an　　　　　　 C. the　　　　　 D. /