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.

1. The chemical factory p__________ terrible gas every day.
2. If you b__________ some fresh air, you will feel better.
3. Don't d__________ me now. I'm doing my homework.
4. As we know, n___________ of us likes pollution.
5. You shouldn't throw r___________ here and there.
6. We should do everything we can to protect the e___________.
7. Everyone is s__________ to do something useful.
8. Trees can p__________ the sand from moving towards the rich land.
9. You'd better take a taxi i__________ of walking there. Because it's a long way.
10. We really need to collect w__________ paper and soft drink cans.

1. This exercise is difficult but that one is e_________.
2. —Doctor, I have a toothache.    —Open your m________ and let me have a look.
3. The young man likes to eat out because he h________ to do the dishes at home.
4. Could you please s________ the floor? It's vey dirty after the dinner.
5. In some ways we look the same, in some ways we look d________.
6. China is in the east of ________ (亚洲).
7. Today is Tuesday and ________ (昨天) was Monday.
8. Peter's ________ (梦想) is to buy a big house for his parents.
9. I'm very ________ (口渴的). So I want to drink some water.
10. Could you please ________ (喂养) my cat when I'm on vacation?

1. The teachers' o       are upstairs.
2. The birds were flying about and twittering with d         .
3. Did Mr Black leave any m       for anybody?
4. The telephone r        again ahout ten o'clock last night.
5. Will the b       ring if I press the switch?
6. The idea  s       good.
7. She went m       after the death of her son.
8. Many foreign friends are e      to visit the Great Wall.