21. Do you know how__________(work) out the problems?

20. How long do you spend _________( do) your homework?

19. We already have a great time ___________(chat) with our classmates.

18. He is clever, because he always answers the questions_________(correct).

C.　　 用所给动词的适当形式填空:(5’)

17. Who is __________, Hobo or Eddie?(lazy)

16. His favourite subject is computer _____________( study).

15. Kate is my best friend, and I like her big, ____________(smile) eyes very much.

14.　 Students can read magazines during the ___________(read) Week.

13.　 The dishes taste delicious. They’re ____________(taste).

12.　 My parents are________. And now I’m having _________lessons. (drive)