-What made you so happy?-_____the driving test.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/17 18:31:45

-What made you so happy?-_____the driving test.
A Passing B Passed C Because of passing D To pass
我知道正确答案是A,可是为什么其他的不行呢,

这里是一个简略式回答,只有主语（通过驾驶考试）,是针对what的.还原为完整句就是：passing the driving test made me so happy.
选B,就是完整回答,前面需要主语.i passed the driving test.
选C这个because of是多余的,反倒让句子成为原因状语,主句反而没有了.
D是不定式,由将来蕴含,与前面所推断的“过去发生的事”made不符合,因此也不能选.

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