Teachers at our university______to publish at least two research papers each year.

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问题 Teachers at our university______to publish at least two research papers each year.

选项 A、will require
B、require
C、are requiring
D、are required

答案D

解析句意：我们大学要求老师每年必须发两篇学术论文。老师被要求，用被动句。

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英语

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