To know what is good and______are two different things.

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问题 To know what is good and______are two different things.

选项 A、doing what is right
B、to do what is right
C、did what was right
D、to do what was right

答案B

解析 to do what is right．与句前的to know what is good为对称平衡结构，共同作并列主语，故选B。

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大学英语三级A级

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