1. 选词填空

could,   must,   might,   can't,   mustn't,   needn't,   have to

1. （1） —Who is the man over there? Is it Mr. Li?

   —No, itbe him. Mr. Li is much taller.

3. （2） When you cross the street, yoube careful.
5. （3） Liu Haibe in the street, because I have just seen him in the classroom.
7. （4） —Must they come to the party at five tomorrow?

   —No, they.

9. （5） It's late. Igo home now.
11. （6） —I speak to Miss Green, please?

    —Speaking.

13. （7） It's dangerous. Youplay football on the street.
15. （8） The guitarbe Alice's. She plays it.