We that the magazines you have borrowed be returned to the school library before the end

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A. hoped
B. permitted
C. wished
(答案→)D. required
解析：考查虚拟语气。That引导的宾语从句谓语动词用的是(should) be returned结构，you have borrowed是定语从句，四个选项中只有required当要求讲时，宾语从句的谓语动词用(should)+do的虚拟语气。所以选D。