1. She______you last week, for she was not there
A.must not have seen B.should not have seen
C. could not have seen D. hadn’t seen
2. I’ll let you know as soon as he______
A. Arrives B. will arrive
C. Is going to arrive D. arrived
3. If you ______that night, you might have been too late to get your ticket
A. Didn’t hurry
B. Hadn’t hurried
C. Wouldn’t hurry
D. Wouldn’t have hurried
4. We found out that the plane_______when we go to the airport
A. Already took off
B. Had already taken off
C. Was already taking off
D. Was already taken off