All the members of his family came home _______ Christmas.A from B for C in

All the members of his family came home _______ Christmas.A from B for C in

题目
All the members of his family came home _______ Christmas.A from B for C in
答案
Christmas表示一个节日,某个时候,所以前面缺表“在”的词.故用in,表示“在Christmas时,他家人都回来了!
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