单词拼写：根据句意和所给首字母提示完成句中所缺单词。

1. We've made great p__________ in solving the problem of air pollution recently.

2. All parents hope their children can receive the best e__________.

3. My e__________ sister is three years older than me.

4. You need a lot of t__________ in listening, speaking, reading and writing if you want to improve your English.

5. With the d__________ of our society, our life is getting better and better.

6. Who can describe the changes in d__________ that have taken place in our city?

7. U_________ anyone has anything else to say, the meeting is closed.

8. I don't go to play much n__________ because I'm too busy.

9. It is important that we should be f__________ with each other.