________causedhertofailinthee

发布时间：2020-07-28 04:05:22

________ caused her to fail in the exam was ________ she hadn't studied hard．A.What; becauseB.What; whyC.That; thatD.What; that

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D解析what引导主语从句，并且在从句中充当主语，其表语从句的连词应为that, that在名词性从句中不充当任何句子成分。
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