4.(　　 ) I 　　　　to music at 7:00 this morning.

　　　　　 A. listen　　　 B. listening　　　　 C. listening

3.(　　 ) Can I______ this book?

A. have　　 B. has　　　 C. having

2.(　　 ) What did you do last night?

I did my homework and _______TV.

A. watch　　 B. watched　　 C. am watching

1.(　　 ) Look! LiPing and Li Ying ________ basketball now.

A. play　　 B. played　　 C. are playing　　 D. will play

补充说明：

★在can，may，must；do，does，did；help，let, to……等词的后面用动词的原形。

★句子的时间改变，动词的形式也随之改变。如：

I worked very hard last year.

I 　　　　　　　　　very hard now.

100. Do you have to _____ by　 10 o'clock?

　 A. go bed　　 B. to go bed　　 C. go to bed　　 D. going to bed

99. _______ here.

　 A. Don't smoking　 B. No smoke　 C. No smoking　 D. Doesn't smoke

98. I want to go shopping. _______ you?

　 A. How are　　 B. What about　 C. Can I help　 D. Would

97. Oh, it's time ______ home.

　 A. to go　　 B. for go　　 C. going　 D. would go

96. _______ do you like koalas?　 　Because they are cute.

　 A. Why　 B. Why do　　 C. What do　 D. Where do