根据句意拼写单词，或用所给词的适当形式填空。
1. We should learn to _____ (结合) work with pleasure.
2. A pigeon is the _____ (象征) of peace.
3. Can you guess the answers to these _____ (谜语)?
4. My sister is good at _____ (打字).
5. The dustman collects lots of _____ (垃圾) every day.
6. People use ICQ to have _____ (联机的) conversation with friends.
7. I _____ (normal) get up at six in the morning.
8. We must _____ (seek) a solution to the problem.
9. E-mail English is a new kind of _____ (write) English that is very popular among the young people.
10. I want to know _____ (who) books they are.
