练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情

    8、The Amazon Valley is very important to the natural balance of the earth. Forty percent of the world’s oxygen ______ there.

    A. produces             B. is produced          C. has produced               D. has been produced

    8、B

    请在这里输入关键词：
    相关习题

    科目：高中英语 来源： 题型：

    The Amazon Valley is very important to the natural balance of the earth. Forty percent of the world’s oxygen ______ there.

    A. produces             B. is produced          C. has produced               D. has been produced

    查看答案和解析>>

    科目：高中英语 来源： 题型：

    The Amazon valley is very important to the natural balance of the earth．Forty percent of the world’s oxygen     there．   

        A．produces       B．has produced      C．is produced      D．has been produced  

    查看答案和解析>>

    科目：高中英语 来源： 题型：

    The Amazon valley is very important to the natural balance of the earth．Forty percent of the world’s oxygen　　　 there．

    　 A．produces　　　　　　　　 　　　 B．has produced

    　 C．has been produced　　　　　　　 D．is produced

     

    查看答案和解析>>

    科目：高中英语 来源： 题型：

    Ｔhe Amazon valley is very important to the natural balance of the earth.Forty percent of the world’s oxygen 　　 there.　

    A.produces　　　 B.has produced　 C.is produced　　 D.has been produced

    查看答案和解析>>


    同步练习册答案