_____ makes his parents proud is _____ his son has been admitted by Beijing University.A.That; becauseB.That; whatC.What; thatD.What; because
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C解析主要测试主语从句和表语从句。从题干可知句中包含三套主谓结构，因此需要两个连词来引导句子，另外句子_____ makes his parents proud 既要充当主语从句，还缺少主语，所以用what来引导，由此先排除两个