1. 用方框中所给单词的适当形式填空(有一项多余)。

be    open   it   go    thirteen    desk

1. （1） — How old are you?   

   — I'm years old.

3. （2） — What's your ID number, please?

   — is 37242319971 1030721.

5. （3） It's time to have an English class. Please your books.
7. （4） — you a teacher?    

   — No, I am a student.

9. （5） How many are there?