题目内容
【题目】If William had listened to what his teacher said in class, he how to solve the problem now.
A.has knownB.would knowC.would have knownD.knows
【答案】B
【解析】
考查虚拟语气。句意:如果William听了他老师在课上说的,他现在就知道如何解决这个问题了。本题为错综时间条件句中的虚拟语气,即条件从句与主句所指时间不一致,如从句指过去,而主句即指的是现在或将来。本句中从句表示对过去情况的假设,而主语中根据now可知表示对现在情况的假设,谓语动词用would+动词原形,故选B。
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