用所给单词的适当形式填空。
1. A balanced diet helps you __________ (stay) healthy.
2. A sore throat can __________ (give) you a fever.
3. Who __________ (teach) you English in your class?
4. I'd like __________ (talk) to you after class.
5. Look! The children ___________ (come).
6. I believe it's important __________ (sleep) eight hours a night.
7. It's time __________ (go) to school.
8. —Where did you go for vacation?
—I __________ (go) to New York.
9. I think I'm ___________ (get) a cold, too.
10. When you are tired, you should ___________ (go) to bed early.
该电路的功率因数等于（）。