She is a hardworking student, and all he...

She is a hardworking student, and all her spare time she has ________ staying in the library.

A．spent B．is spent

C．to spend D．to be spent

B 【解析】B 考察时态和语态。句意：她是一个勤奋刻苦的学生，她所有的业余时间都是在图书馆里度过的。句式分析可知all her spare time在句中是主语，she has为省略了引导词that或which的定语从句，主句中缺少谓语动词，且根据句意可知此处应该使用被动语态，故B正确。

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