What are you doing（）vacationI‘m staying（）home.What are you doing（_英语解答

What are you doing（）vacationI‘m staying（）home.
What are you doing（）vacationI‘m staying（）homeA for at B on in C for on

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解答

during
atA for at B on in C for onon vacationat home答案是A/*答案是错的。*/我想了想，for也没错，有一段时间的概念。on 也可以。