练习册

  • 练习册
  • 试题
    This river very clean. Now it’s getting dirtier and dirtier. A. used be B. used to be C. used being D. is used to be 【查看更多】

     

    题目列表(包括答案和解析)

    This river ________ very clean. Now it’s getting dirtier and dirtier.

    　　 A. used be B. used to be C. used being D. is used to be

    查看答案和解析>>


    同步练习册答案