职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:英语知识运用 题类:期中考试 难易度:中档

    The plane had taken off. We could not help but ____ for the next flight.

      

    A. waiting        B. to wait                C. wait              D. to be waiting
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