Class regulations require is the last to leave the classroom off all the lights.A．who; should turnB．whom; shall turnC．whomever; turnsD．whoever; turn 题目和参考答案——青夏教育精英家教网—

题目内容

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

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（should）do。

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