—Who is the girl standing over there?
— Well, if you _____ know, her name is Mabel.
A. may B. can C. must D. shall
—They haven’t finished the work up to now.
—Well, they________.
A. should B. should have C. would D. must have
It is not like Jack to be unfriendly, so he _________ you when you called.
A. can’t have seen B. should not have seen
C. must not have seen D. need not have seen
He used to teach in that university and I _________ ride past it on my way to work.
A. would B. could C. should D. might
On Sundays when I was a child, Father and I _______ get up early and go fishing.
A. could B. would C. might D. should
The thief ________ in from the kitchen window as the door was closed.
A. may climb B. must have climbed
C. could have climbed D. should have climbed
