体内不易分解的气体或易挥发性毒物主要为（）

A.经呼吸道排出

B.经肾排出

C.经肠道排出

D.经皮肤排出

E.随眼泪排出

根据句意，用括号内所给词的适当形式填空。

1. I think everyone has two________(foot).

2. The old man has a serious________(ill).

3. Mr Chen is often________(stress) out.

4. It's easy to stay________(health).

5. My brother's________(speak) Chinese is very good.