——Tom is never late for work. Why is he absent today?—— Something _____to him.
#87520
A
must have happened
B
can have happened
C
must happen
D
can happen
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As it turned out to be a small house party, we        so formally.
#86499
A
needn’t dress up
B
did not need have dressed up
C
did not need to dress up
D
needn’t have dressed up
You must have waited here for a long time ,___________you?
#88229
A
mustn’t
B
didn’t
C
haven’t
D
hadn’t