I.单项选择(15分)
1. ____ Browns are going to the park. Why don’t we go for ____ walk, too?
A. A; an B. An; / C. The; a D. /; a
2. –Li Jiacheng plans to give ____ of his money to the charity.
– Really? What a kind man he is!
A. two third B. two three C. two thirds D. two threes
3. _I knocked into a tree when I when to the railway station for my friend.
_ I think you ____ too fast.
A. drive B. are driving C. to drive D. were driving
4. If we can’t do anything to save our factory, it may ____.
A. put down B. look down C. close down D. turn down