用所给词的适当形式填空。
1. Jay sang the song ________ (beautiful).
2. The water in the river is _________ (harm). You can drink it without cooking.
3. When I passed the driving test, I thought I was the _________ (luck) person in the world.
4. Danny and Daniel are brothers, and their _________ (wife) are sisters. That's interesting.
5. This dress is very popular this year. Do you know who the ________ (design) is?
6. What do you think about the air _________ (pollute) in your hometown?
7. They stopped _________ (talk) and listened to their teacher.
8. Many people use computers in their _________ (day) lives.
