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, Marry?
    —I have a bad s ______.