题目内容
Class regulations require ______ is the last to leave the classroom ______ off all the lights.
A. who; should turn B. whomever; turn
C. whoever; turning D. whoever; turn
D
考查宾语从句及虚拟语气。句意:班级公约要求无论谁最后离开教室都应该关掉所有的灯。第一空whoever在宾语从句中作主语;第二空(should)turn off all the lights,此处should被省略。
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