Thehazeorsmogwassoseriousthatthewinterrunning
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問題詳情:
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
【回答】
D
知識點:虛擬語氣與情態動詞
題型:選擇題
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