当前学科:英语
  • 题目: 未知类型
    The old man was very worried about his son's safety, and he walked___in his room.

      A.by and by

      B.to and fro

      C.again and again

      D.foot by foot

    答案: <查看本题扣1积分>

    查看答案

    答案不对?请尝试站内搜索