Professor Smith, many students want to see you. __________ they wait here or outside?
A. Do B. Shall C. Will D. Would
Better go to see my sick colleague right now, ________I?
A. hadn’t B. didn’t C. don’t D. won’t
I promised to get there before 5 o’clock, but now the rain is pouring down. They ______ for me impatiently.
A. may wait B. ought to wait C. could wait D. must be waiting
She’s already an hour late, What _____to her?
A can have happened B may happen
C should have happened D may have happened
As it tuned out to be a small house party, we ____ so formally.
A. needn’t dress up B. couldn’t have dressed up
C. didn’t need dress up D. needn’t have dressed up
— The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
— Oh, dear! She ______ a lot of difficulties!
A. may go through B. might go through
C. ought to have gone through D. must have gone through
