It's a book.

一本书。

Thank you. Bye-bye.

谢谢。再见。

Please sit down.

请坐。

Theirs, I think.

我想是他们的。

What's wrong?

怎么了？

I'm Jim-Jim Green. This is my friend, Bill-Bill Smith. He's American.

我叫吉姆格林，这是我的朋友比尔斯密斯。他是美国人。