练习册

  • 练习册
  • 试题
    ( ) It’s our duty the classroom . A. keep; clean B. to keep; clean C. to keep; cleaner D. keep; cleaner 【查看更多】

     

    题目列表(包括答案和解析)

    It’s our duty _______ the classroom _______ .

    A. keep; clean

    B. to keep; clean

    C. keep; cleaner

    D. keeps; clean

    查看答案和解析>>

    It's our duty ________ the classroom________.

    A. keep; clean　　  B. to keep; clean　　 C. to keep; cleaner  D. keep; cleaner

     

    查看答案和解析>>

    It’s our duty　______　the classroom　______.

    A. keep; clean

    B. to keep; clean

    C. keep; cleaner

    D. keeps; clean

    查看答案和解析>>


    同步练习册答案