_________ caused the accident is still a mystery.A.HowB.WhatC.ThatD.Where
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_________ caused the accident is still a mystery. |
答案
B |
解析
试题分析:句意:什么事情引起的这个事故仍然是一个谜。这里是what引起的主语从句,what在从句中作主语,从句作主语时,谓语动词一般情况下应该单数;that在主语从句中,不作成分;how与where不能在从句中做主语,因为这里缺少的是主语从句的连词,并且连词在从句中作主语,故选B。 |
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