补全对话

A. No, it isn't. B. Let's go home. C. Silly me. D. Where is my ruler? E. It's under your book, too.

Tom：Hi, Jack.

Jack：OK.

Tom：Uh-oh!

Jack：Is it in your pencil box?

Tom：

Jack：Look, it's under your book.

Tom：Oh, yes.

Jack：And your pen!

Tom： Thank you.