______ made things worse, Peter said, was that his parents stopped supporting him in developing the “flying car”.A.ItB.WhichC.AsD.What
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D解析试题分析：考查what引导的主语从句，what在主语从句中做主语，Peter said是插入语，句意：皮特说：使事情更糟糕的是父母不再支持他的飞车。选D。考点：考查主语从句
点评：主语从句要分析句子成分，如果是完整的句子，就用that，如果缺少主语，宾语和表语就用what，固定词组要多记多背。