练习册

  • 练习册
  • 试题
    As a UN report warns, animals at a speed 100 times faster now than any time in the past since the dinosaurs were wiped out. A. are dying out B. have died out C. were dying out D. had died out 【查看更多】

     

    题目列表(包括答案和解析)

    As a UN report warns, animals ________ at a speed 100 times faster now than any time in the past since the dinosaurs were wiped out．

    [　　]

    A．are dying out

    B．have died out

    C．were dying out

    D．had died out

    查看答案和解析>>


    同步练习册答案