you should go to bed early ()a few nights.填什么介词?at可以吗

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you should go to bed early ()a few nights.填什么介词?at可以吗

you should go to bed early ()a few nights.填什么介词?at可以吗
you should go to bed early ()a few nights.填什么介词?at可以吗

you should go to bed early ()a few nights.填什么介词?at可以吗
at nights
每夜,夜夜; 经常在夜里
口语的话也可以用:on nights ,of nights ,视情况而定
at night
天黑时; 在夜里,夜间,晚上