根据句意及词首字母或汉语提示，补全单词。

1. Don’t forget to send an e-mail to me. The a_________ is happy@sina.com.

2. Animals are our good friends. We should p_________ them.

3. I’m not sure w_________ there are UFOs.

4. —What were the children doing at this time yesterday?

    —They were _________ (给……喂食) animals on the farm.

5. —Lisa, you look much _________(瘦的) than before. Why?

    —I become interested in tennis and I often play it with my friends.

咳嗽的辨证首先应区别（）。

A.实证与虚证

B.外感与内伤

C.阴证与阳证

D.在气与在血

E.寒证与热证