-----she was invited to the ball made her very happy A.what B.that C.when D.because

-----she was invited to the ball made her very happy A.what B.that C.when D.because

为什么选B不选A啊、、求解释
主语从句中that只起引导词衡仿作用,租拦余不做成分也没有意义she was invited to the ball 成分意义均完整。
而what一般在从句中做主弊滚要成分(主语,宾语等),且有意义(可根据句意灵活翻译),如:
1.That he came late again made the teacher angry.
2.What he said in class made the teacher angry
这是that引导的主语从句,在复合句中充当主语源枝成分的句子叫粗辩做主语从句雹凳敏.引导主语从句连词有that,whether,who,what,whatever等
What 引导主语从句时在从句中充当句子成分,如主语.宾语.表语,而that 则不然。例如:
  What you said yesterday is right.
选择B
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