从总体上来说，投资分为固定资产投资和流动资产投资。流动资产投资包括以下（）投资。

A．土地

B．房屋

C．机械设备

D．原材料

E．辅料

用所给单词的适当形式填空。

1. They are playing games. They are very ______ (relax).

2. There are many different kinds of ______ (scarf) in the mall.

3. What a ______ (sun) day it is!

4. The man enjoys ______ (lie) on the beach.

5. I usually sleep when it's ______ (rain).