Ⅰ. 用括号内所给词的适当形式填空(3分钟，10分)
1. The teacher will go out to play snowballs with us if it _______(not snow) this afternoon.
2. Mr. Brown is learning English for _______ (business).
3. Please teach us how _______ (bake) cookies.
4. There are some good ways of _______ (push) your new book.
5. My father is the _______ (own) of this car, so you should ask him to borrow it.
