---I want to know when ______have a field trip.---We’ll have it when all the workA.you are, will finishB.you will, finishesC.you will, is finishedD.you will, is finish
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C解析考查when的两种用法和被动语态。在第一句中when引导时间宾语从句,不影响从句的时态。而在第二句中when引导的是时间状语从句,从句表达的是一个事实,所以第二空应填一般现在时。而从句主语是“工作”,应该用被动语态is finished。