He____to school,so he turned off the alarm clock and went back to sleep.
A．needn’t have goneB．hasn’t needed to go
C．needn’t goD．didn’t need to go
D

試題分析：考查情態(tài)動詞用法。Needn’t have done本沒有必要做某事；didn’t need to do 不必做某事；本句并不是虛擬語氣，是一個陳述語氣。句意：他不必去學校，于是他把鬧鐘關(guān)掉了回去睡覺。故D正確。
點評：情態(tài)動詞的用法要注意和虛擬語氣的融合，本句并不是虛擬語氣，只是表示實際上的陳述語氣。
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