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—The light in the office is still on. — ...

—The light in the office is still on.

— Oh I forgot _______.

A.turning it off B.turn it off C.to turn it off D.having turned it off

 

C 【解析】 考查固定短语。句意:—办公室的等还在亮着。—哦,我忘了要关灯了。固定搭配forget to do忘记要做某事,forget doing sth.忘记已经做过的事情。turn off关掉,根据“The light in the office is still on.”可知,忘记要关灯了。故选C项。  
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