问题
选择题
Liu Xiang has failed over and over again in the past years. And that's _________ he succeeds.
A．what
B．when
C．why
D．where
答案
答案：C
根据关系代词或关系副词在句子中所做的句子成分，故选C
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Liu Xiang has failed over and over again in the past years. And that's _________ he succeeds.
A．what
B．when
C．why
D．where
答案：C
根据关系代词或关系副词在句子中所做的句子成分，故选C