用所给词的适当形式填空。
1. Where _______ (do) Mary go on vacation?
2. How often does Mary __________(exercise)?
3. Mr Li ________(run) two miles in the morning.
4. Tom probably___________(work) out twice a day.
5. Billy always ________(wear) a safety helmet(头盔).
6. T doctor asks me to eat ________(little) food.
7. Tom is __________(difference)from Jim.
8. He __________( practice) English every day.
9. Do you think milk is kind of ________(health) food?
10. He has a habit of _________(get)up early.
