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:其他 难易度:较难

    China has changed its one-child policy by approving ________ a second child only if they want to.
    A. couples have              B. couples of having      C. of couples having    D.   couples to have
  • 相关试卷