练习册

  • 练习册
  • 试题
    The Blacks their bags with their books . A. are busy filling B. is busy filling C. are busy to fill D. is busy to fill 【查看更多】

     

    题目列表(包括答案和解析)

    The Blacks ___________ their bags with their books．

    　　A．are busy filling　　B．is busy filling　　C．are busy to fill D．is busy to fill

    查看答案和解析>>


    同步练习册答案