根据句意及首字母或汉语提示完成句子。
1. Please don't w _____ water. Can't you see the sign "Save Water"?
2. Many students think that teenagers should be a _____ to choose their own clothes.
3. We will be the masters of the 21st c _____.
4. I w _____ if you can give me a hand.
5. —Thank you very much for helping me with my homework.
—It's my p _____.
6. Lucy and Lily are twins，so they are s _____ in many ways.
7. The teacher had talked with the students w _____ homework hadn't been handed in.
8. I like m _____ who play different kinds of music.
9. The man won a m _____ pound in the game.
10. Are you afraid of f _____ in an airplane?