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.

76. - Thank you very much.

- B: ______________ (别客气) .

77. - Can you mend my clock?

- Sorry, __________________ (我认为不行) .

78. - What would you like, Mingming?

- _______________ (我想喝杯茶) .

79. - Can you make bread?

- Yes, I can. __________________ (这很容易) .

80. - ____________________ (你能看见几瓶桔子汁)？

- I can see two.

75. You can't carry the big box. Let me ______ (help) you.

74. They want ______ (see) Uncle Wang after school (放学后) .

73. ______ you ______ (have) a frisby?

72. Listen! The students ______ (sing) an English song (歌曲) .