Sorry, I’m late. I ____ have turned off the alarm clock and gone back to sleep again.
A．mightB．shouldC．canD．Will
A

試題分析：考查情態(tài)動詞表示推測的用法區(qū)別。該題的謂語動詞結(jié)構(gòu)為“情態(tài)動詞+have+過去分詞”，表示對過去情況進(jìn)行推測。A項(xiàng)表示“過去可能會發(fā)生某事，但并未發(fā)生”；B項(xiàng)意為“本應(yīng)該做某事但實(shí)際未做”；C項(xiàng)can用語推測時(shí)常用于否定句和疑問句，故排除；D項(xiàng) will have done不是推測而是將來完成時(shí)，表示到將來某時(shí)就完成某事時(shí)用的；根據(jù)句意“對不起，我遲到了，我也許關(guān)掉了鬧鐘又回去睡覺了�！惫蔄是正確。
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