The haze or smog was so serious that the winter running _________.Some students complained as they ran
A.could have cancelled | B.should have cancelled |
C.must have been cancelled | D.ought to have been cancelled |
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The haze or smog was so serious that the winter running _________.Some students complained as they ran
A.could have cancelled | B.should have cancelled |
C.must have been cancelled | D.ought to have been cancelled |