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。

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

小题1:The rain coat is used for ___________ the rain .
小题2:The book __________ educating teenagers
小题3:___________ my home , when you have time .
小题4:You are supposed to ________ when you meet someone for the first time in China .
小题5:He studies hard ________ go to a good university .