题目内容：

A. It's Helen's. 

B. Are these your erasers?

C. Is that yours?

D. Where's your pen?

E. You're welcome.

F. The blue pencil is his

G. No, there aren't.

Jimmy:  Hi, Betty. 1.

Betty :No, they're Bob's.

Jimmy :And is this his green pencil?

Betty: No, it isn't. 2.

Jimmy: What about this notebook?

Betty: 3. And the green pencil is hers, too.

Jimmy: And the pencil box? 4.

Betty: Yes, it is.

Jimmy: Thank you for your help, Betty.

Betty: 5.