根据印花税的有关规定，以下合同中属于购销合同的有（）。

A.出版单位和发行单位之间订立的图书订购单

B.二手房转让合同

C.商品房销售合同

D.发电厂与电网之间签订的购售电合同

根据句意及首字母的提示，补全单词。

1. Do you eat more h_____ now than before?

2. You should get e   __ _ sleep.

3. Try not to eat too much s_____ or oil.

4. Don't meet up with s_____.

5. G_____ to a happier, healthier and longer life.