根据句意及汉语提示，写出单词。

1. We should use a _____ (词典) more often when we meet new words.

2. Miss Gao is a journalist. She has written many good _____ (文章).

3. English is the official _____ (语言) in his country.

4. What's wrong with your _____ (舌头)?

5. Paul is a shy (害羞的) boy who can't _____ (交流) very well.