词汇运用：
1. There is less air ___________ (污染) in the country than in the city.
2. I was ____________ (惊讶) to meet my favourite star in the street.
3. Where is the ___________ (出口) to the new supermarket?
4. This sofa is very ___________ (舒适的) to sit on.
5. I can see many ___________ (顾客) in my cousin's shop on Sunday.
6. Mary is very happy because today is her _________ (twelve) birthday.
7. The children can't wait __________ (open) the presents.
8. The students usually walk out of the classroom _________ (quick) after class.
9. The girl is looking forward to _________ (buy) that new dress.
10. We would like everybody __________ (have) a good time there.
