Shedoesn'tknow________

发布时间：2020-07-17 05:06:19

She doesn't know _________________ made her daughter so sad this morning.A.what was itB.why it was thatC.how that wasD.what it was that

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D解析强调句的特殊疑问句用作宾语从句时用陈述语序宾语从句缺主语故用what 引导。
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