1. 为下列句子排序。

() These are all books about science.

() That's a good idea.

() Let's put them on this shelf.

() We can put them on Shelf B.

() Let's make a home library.

Number one, let's make a home library.<br />Number two, that's a good idea.<br />Number three, these are all books about science.<br />Number four, let's put them on the shelf.<br />Number five, we can put them on shelf B.