761.They _____ have arrived at lunchtime but their flight was delayed.
A.will
B.can
C.must
D.should
762.If you _______ smoke,please go outside.
A.can
B.should
C.must
D.may
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761.They _____ have arrived at lunchtime but their flight was delayed.
A.will
B.can
C.must
D.should
762.If you _______ smoke,please go outside.
A.can
B.should
C.must
D.may