That's a book.

那是一本书。

I'm reading a book.

我正在读一本书。

What did you ask him?

你问他什么？

How far is it to the university?

它离大学多远？

Do you have change for a twenty-dollar bill?

你付了一张20美元帐单了吗？

I wish you would give me a more detailed description of your trip.

我希望你将给我更详细地描述你的旅行。