一、单项选择（15分）
( )1. The children enjoyed_______ very much last night.
A. they B. them C. themselves D. theirs
( )2. -Don't step on the grass next time, Mike.
-_______.
A. Is that so? B. Don't worry. C. I don't know. D. Sorry, I won't
( )3. The White House is a beautiful building_______ a big garden and many trees.
A. have B. has C. with D. there is
