7.(　　 )How long did you _______ yesterday?

A.skate　 B.skated　 C.skating　 D.to skate

6. If I _______ enough money, I _______ a hospital for SARS patients.

A.will have, build　 B.will have, will build

C.have, will build　 D.have, build

5.(　　 )How long have you been _______ sports?

A.watch　 B.to watch　 C.watching　 D.watched

4.(　　 )----- How long has the man been waiting?

------ He ____________ for 20 minutes.

A.has been waiting　 B.is waiting　 C.was waiting　 D.will wait

3.(　　 )I have been practicing the piano _______ 1997.

A.for　 B.since　 C.on　 D.in

2.(　　 )Will there _______ more people in the future?

A.is　 B.am　 C.are　　 D.be

从下列各句所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

1.(　　 )I like _______ stamps.

A.collect　 B.collected　 C.collecting　 D.to collecting

10. A. to home　 B. home to　C. home　D. homed

9. A. have…gone　　 B. have…been to　

　C. has…gone　 　 D. have…been

8. A. returned　B. returns　C. to return　D. returning