1.It’s his pencil-box. (改为复数)

Sam: Hello!

Mike: _____ , Bill!

Sam: No, _____ is Sam.

Mike: Hi, Sam. 　_____is Mike. _______ are you?

Sam: Fine, _______ ，Mike.

Mike: Is Bill _____ ?

Sam: _____ , he’s not ____ home.

Mike: Ok, _____ 　you. Goodbye!

Sam: _____ !

10. How old _____ 　he ?　 I don’t know he’s very old .

9. What are these ?　 They _____ boats .

8. What_____ 　one plus seven?　 It’s eight .

7. ____ these your books? Yes, they ____.

6. Tom and Joy ____ in Grade 1.

5. Who ____ that woman?

4. I ____ in Class 2, and my friend ____ in Class 3.

3. ____ everyone here today?