练习册

  • 练习册
  • 试题
    The earth won’t be fit for us to live in we go on polluting it. A. even if B. if C. unless D. so 【查看更多】

     

    题目列表(包括答案和解析)

    The earth won’t be fit for us to live in _____ we go on polluting it.

    A. even if                            B. if                      C. unless                      D. so

    查看答案和解析>>


    同步练习册答案