1. (2021七上·大冶期中) 请阅读下面的对话，根据对话内容补上所缺句子，使对话通顺、合理，意思完整。(每空一句)

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. .

Betty: No, they're Bob's.

Jimmy: And is this his green pencil?

Betty: No, it isn't.

Jimmy: What about this notebook?

Betty: And the green pencil is hers, too.

Jimmy: And the pencil box?

Betty: Yes, it is.

Jimmy: Thank you for your help, Betty.

Betty: