Ⅰ. 单项选择(每小题2分，共20分)
1. Then cut up ________ onion and ________ tomato.
A. a; a B. an; an
C. a; an D. an; a
2. Jack, ________ play around here. Your sister is asleep now.
A. doesn't B. not
C. no D. don't
3. You paid ￥10 for ________ this morning.
A. 4 bottle milks B. 4 bottles of milk
C. 4 bottles of milks D. 4 milk
