用所给单词的正确形式填空。
1. Last football match was very ________ (excite).
2. ________ (stay) up late is bad for your health.
3. Why don't you ________ (give) up smoking?
4. My parents didn't feel ________ (good) last Sunday.
5. ________ (not walk) on the lawn. We must protect (保护) our environment.