[单选题]The building ______ since you ______. A.has constructed; have left B.constructed; left C.has been constructed; left D.has been constructed; have left
参考答案:C
【详解】 考查时态。句意:自从你离开,这栋楼就已经被建造了。分析句子,since表示“自从”,引导时间状语从句,从句应用一般过去时,主句应用现在完成时,且construct与主语The building之间是被动关系,所以第一空应用现在完成时的被动语态,即has been constructed。故选C项。