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:选择题 题类:单元测试 难易度:易

    It’s a good idea to put up a notice to _________ people to live a green life.
    A. call on B. care for C. depend on D. keep off