You 'll have to book up early.

你要想看那场演出就得提前订票。

Pick your book up off the floor.

把你的书从地板上拣起来。

The boy folded a book up in paper.

这个男孩用纸把书包起来。

Why not book up now?

为什么不现在订票呢？

We have finished half of the book up to now.

我们现在已完成了书的一半。