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.
