第一节 单项填空(共16小题;每小题1分,满分16分)
21.Nobody recognized her at the ball because she as a maid..
A. dress up B. was dressing
C. was wearing D. was putting on
22. —Is John coming by train?
—He should, but he not. He likes driving his car.
A. must B. can C. may D. need