根据句意及首字母的提示，补全单词。

1.  When we meet for the first time, we usually s ____   hands.

2.  I don't want to eat anything.  I'm f______.

3.  I often brush my teeth with this kind of t______.

4.  I,t is a good way to  ____   HINl by washing hands with soap.

5.  I don't know the man.  He is a s ____