根据句意和首字母提示补全下列各句中的单词。 1. He is very o___
题型：填空题
问题：
根据句意和首字母提示补全下列各句中的单词。
1. He is very o______, because he likes talking and laughing.
2. My father u______ to be a teacher, but now he is a writer.
3. He has c______ a lot. Because he is different from the past.
4. I am not afraid of the d______. I dare to go out.
5. I often send and receive e______ on the Internet.