--- There is someone at the door. Who ______ it be? Is it the postman?--- No, it ________ be him. It’s just seven o’clock. It’s too early.
#75704
A
may, can’t
B
will, won’t
C
may, mustn’t
D
must, may not
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—It's no easy task to catch a ticket on a website that receives 1 billion clicks daily.—I can't agree with you more. There ________ be errors for every single step.
#62404
A
should
B
must
C
can
D
will
—I wonder why Susan looks worried today. —I’m not sure, but she _____a small accident driving here.
#62614
A
could have
B
might have
C
might have had
D
must have had
For everyone’s safety, we ___________ a1ways remember the law against driving after drinking.
#76599
A
could
B
should
C
might
D
would