She is so clever and ____hard A.studies B.studying

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She is so clever and ____hard A.studies B.studying
She is so clever and ____hard A.studies B.studying

She is so clever and ____hard A.studies B.studying
studies,和前面的is clever构成并列谓语

应该选B吧,一句话当中不可以出现两个动词的

A

选A