Ah, it's a secret!

呵，这是个秘密！

No, they aren't. They're their books.

不，不是我的。这些是他们的书。

Yes, it is.

是的。

Is it a black one?

是快黑的吗？

I don't think so. Here you are. Catch!

我觉得没有。给你，接住！

Jim is writing. Lily isn't writing. She's looking at the blackboard.

吉姆在写字。莉莉没在写字。她在看黑板。