练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情
    I had not been reading for half an hour _____ I heard steps outside.

    A. while
    B. as
    C. when
    D. since
    C
    请在这里输入关键词：
    相关习题

    科目：高中英语 来源：0125 模拟题 题型：单选题

    I had not been reading for half an hour _____ I heard steps outside.
    [     ]
    A. while
    B. as
    C. when
    D. since

    查看答案和解析>>


    同步练习册答案