she would go and inform him if she ___ his address.A know B had known C knew D would have known正确答案是B 为什么要选B 不能选C

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shewouldgoandinformhimifshe___hisaddress.AknowBhadknownCknewDwouldhaveknown正确答案是B为什么要选B不能选Cshewouldg

she would go and inform him if she ___ his address.A know B had known C knew D would have known正确答案是B 为什么要选B 不能选C
she would go and inform him if she ___ his address.A know B had known C knew D would have known
正确答案是B 为什么要选B 不能选C

she would go and inform him if she ___ his address.A know B had known C knew D would have known正确答案是B 为什么要选B 不能选C
过去虚拟条件句时态:if +had+动词过去分词,所以选B

过去式的虚拟语气