用括号内所给词的适当形式填空。

1. I think everyone has two ________ (foot).    

2. The old man has a serious ________(ill).

3. Mr Chen is often ________ (stress) out.      

4. It's easy to stay _______ (health).

5. You should drink _______(lot) of water.      

6. I'm not feeling ________ (good).

7. Chinese Kung fu is popular in many ________ (west) countries.

8. I have a ________ (肚子痛).

9. Although I study hard, my putonghua isn't ________ (进步).

10. It's important to eat a ________ (平衡的) diet.