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:单元测试 难易度:中档

    To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.
    A. carried out B. caught on  C. took up   D. made for
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