用括号内所给单词的适当形式填空。
1. My mother goes to Beijing _________ (two) a year.
2. Thanks a lot for _________ (teach) us so well, Miss Green.
3. He would like _________ (have) a cup of tea.
4. Today is Tom's _________ (fourteen) birthday.
5. You should exercise to stay _________ (health).
6. My father _________ (buy) some DVDs for me yesterday.
7. How many _________ (mile) is it from your home to your school?
8. Taking a boat must be a lot _________ (much) fun than taking a bus.
9. Thanks for your _________ (invite) to your house next week.
10. You should help your sister when she _________ (need) help.
