问题补充:
单选题ThetopofficerinBeijingsaysthatallconstructionworkfortheBeijingOlympicby.A.has been completedB.has been completedC.will have been completedD.will have completed
答案:
C解析句子主语all construction work和 complete构成动宾关系,所以要用被动语态;再者,“by+将来时间”作状语时,句子要用将来完成时态。