用所给单词的适当形式填空。

1. She is worrying about her daughter's _____ (ill).

2. Some countries are good at _____ (prevent) pollution.

3. The fact is that people today live longer than they _____ (do) in the past.

4. Why don't you _____ (write) down your name on the paper?

5. Welcome to our hotel. It's the _____ (good) in the city.