It's a book.

一本书。

How old is she?

她多大了？

Put them over there, please.

请把它们放到那边去。

Who's that?

那是谁呢？

Let me have a look. Oh, here it is. But it's an old one. Where is my new one?

让我看看，在这里，这是那个旧的，我那件新的哪去了呢？

I'm reading a book.

我在读书。