One possible version:
One day, Peter finished his class and was walking home. When he passed by a tap flowing water, he pretended not to see it and went on walking. Just at this time, Mary saw it and rushed to the tap and turned it off as quickly as possible. Because Peter looked at her in surprise after seeing Mary having the tap turned off, she scolded Peter about why he didn’t turn off the tap when he passed by. However, Peter said that it was not his business because it was not he who turned it on, which made Mary very angry and very disappointed.

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