用括号中所给词的适当形式填空。

1. I brush my _      ___ (tooth) before I go to bed every day.

2. Don't eat too much or too little. You need a _______ (balance) diet.

3. You shouldn't __      __ (believe) everything in the newspaper, on TV or the Internet.

4. I'm sorry __       __ (hear)  that you didn't pass the English exam.

5. I hope you'll feel _             (good) soon.

6. It's important ___      _ (stay)  healthy.

7. I'm tired and have a _           (headache) these days.

8. Christmas Day is a ____       (tradition) festival for westerners.

9. _     ___ (eat) green vegetables is good for your body.

10. Chinese medicine is now popular in many __     __ (west) countries.