1. The a ______ came up to me and asked, "Can I help you?"
2. What do you want to do after you g ______ from school?
3. Whenever someone throws in some rubbish, the truck collecting rubbish p___ a piece of music.
4. They should not be treated only as a______.
5. This city has many o ______ buildings.
6. What a w______ memory she has!
7. Every year, water sports, e______ swimming and surfing, attract large numbers of tourists to the islands.
8. The traffic lights c______ from red to green just now.

1. I opened the window to let in the f______ air.
2. He is an old teacher with twenty years' e            of teaching.
3. They can p            us with enough water and food.
4. Playing with a pet dog can bring us a lot of p           .  
5. Excuse me. I w______ if you can tell me where to park my car.
6. The moving love story of Liang Shanbo and Zhu Yingtai is an a______ Chinese legend.

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.