What do they often do ___ Spring Festival's Eve? A at B in C on D of

What do they often do ___ Spring Festival's Eve? A at B in C on D of
What do they often do ___ Spring Festival's Eve? A at B in C on D of

What do they often do ___ Spring Festival's Eve? A at B in C on D of
答案：C .on

解析：在某个节日,具体某一天前面用介词on

翻译：他们在春节经常做什么?



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