Zhengzhou will be more and more convenient when Zhengzhou Subway_____ in two years.A.is pletedB.will be pletedC.will pleteD.has pleted
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A解析考查时态。主句Zhengzhou will be more and more convenient是一般将来时态，所以when引导的时间状语从句要用一般现在时代替一般将来时。且主语Zhengzhou Subway和plete之间是动宾关系，要用被动语态。所以选A，一般现在时态的被动语态。