练习册

  • 练习册
  • 试题
    , it began to run unexpectedly . A. While he was cleaning the machine B. While cleaning the machine C. To clean the machine D. He was cleaning the machine 【查看更多】

     

    题目列表(包括答案和解析)

    ______, it began to run unexpectedly.

     

    　　A. While cleaning the machine B. To clean the machine

     

    　　C. He was cleaning the machine D. While he was cleaning the machine

     

    查看答案和解析>>

    ________, it began to run unexpectedly.

    [　　]

    A．While he was cleaning the machine

    B．While cleaning the machine

    C．To clean the machine

    D．He was cleaning the machine

    查看答案和解析>>


    同步练习册答案