根据句意，从下面的方框中选择适当的短语，有些词语需要变形。
| drop by , in order to , shake hands , aim at , keep out |
The rain coat is used for____ the rain .
The book____ educating teenagers
____ my home , when you have time .
You are supposed to ____ when you meet someone for the first time in China .
He studies hard____ go to a good university .
