问题描述：
帮我区分on holiday ,on holidays,at the weekend,at weekends
jim wants to do sports on Saterdays and Sundays.
同义句jim wants to do sports on＿＿＿＿＿＿＿＿．
jim wants to do sports on Saterdays and Sundays.
同义句jim wants to do sports on＿＿＿＿＿＿＿＿．
问题解答：
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