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:月考试卷 难易度:较易

    It ______ him over 10 years to work on his one-man helicopter and at last he succeeded.

    A. spent B. cost C. took D. paid
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