摘要: Class regulations require is the last to leave the classroom off all the lights. A. who; should turn B. whom; shall turn C. whomever; turns D. whoever; turn [答案] D [解析]考查名词从句的连词和虚拟语气用法.主语从句中缺少主语.故用whoever=the person who, require后接宾语从句.句中动词用do.

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