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        1. ---Is the Youth Center open to the public yet?
          ---Yes. It ______ for almost one and a half years.
          A.has openedB.has being opened
          C.has been openD.was open
          C

          試題分析:句意:青少年中心對公眾開放了嗎?——是的。已經(jīng)開放幾乎一年半了。結(jié)合語境可知下文描述的是一直持續(xù)到現(xiàn)在的動作,故用現(xiàn)在完成時態(tài)。Open用作動詞表示瞬間動作,不能和表示一段時間的時間狀語連用,故選C。
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