根据句意填单词，首字母已给出。

1. We should brush our t_________ every day.

2. If you have a toothache, you must go to see a d_________.

3. I'm very t_________, I want to drink some water.

4. I have an i_________ meeting. I must go now.

5. —Peter. What's the m_________ with you?

    —I'm very tired.

6. His temperature is very high. He has a f_________.

7. You have a sore throat. You should drink some hot tea with h_________.

8. We should try our best to keep the b_________ of nature.

9. He is very tired at the m_________. He is sleeping now.

10. —What's wrong with you, Mary? 

      —I have a bad s_________.