---------leaves the room last ought to tuan off the lights.

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---------leaves the room last ought to tuan off the lights.
______leaves the room last should turn off the lights．
A．The person B.Who C．Whoever D．Anyone为什么直接用anyone不行,非得要加who才行!

who leaves the room last 是一个定语从句用作修饰 anyone who是定语从句的引导词定语从句中引导词可以省去的只有限制性定语从句（就是先行词和引导词之间没有逗号）中的that.所以这里的引导词who不可以省去.
而答案C whoever是一个代词所以这时whoever leaves the room last变成了一个主语从句所以选C

---------leaves the room last ought to tuan off the lights. _______ leaves the room last ought to turn off the lights __leaves the room last ought to turn off the lights. ____ leaves the room last must turn off the lights. ______who leave the room last ought to turn off the lights. Who leaves the room last ought to turn off the light. 一道英语选择题》---------leaves the room last ought to turn off the ____ leaves the room lastought to turn off the lights. ___leaves the room last ought to turn off the ▁▁ leaves the room last ought to lock the door.A.Anyone B.Th Whoever leaves the room last must___that all the lights are 主语从句答案1.____leaves the room last ought to turn off the light