Ⅰ. 单项选择(30分)
( )1. The apples on this tree are bigger than _______ on that one.
A. ones B. those C. them D. apples
( )2. I saw him _______ the building and go upstairs.
A. to enter B. enter
C. entering D. entered
( )3. I’m sorry I can’t agree _______ what you said.
A. to B. with C. of D. for
( )4. The teacher kept the students _______ for half an hour.
A. wait B. to wait C. waiting D. waited