固定用法.
在New Year’s Day,May Day,Children’s Day,National Day前應該用on,在Easter,Halloween,Christmas,Spring Festival,Dragon Boat Festival 和Mid-Autumn Festival前用at.
簡單記：看見這個節(jié)日中有Day,就用介詞on,其余都用介詞at.
Children get gifts ____ Christmas and ____ their birthdays.
Children get gifts ____ Christmas and ____ their birthdays.
A.on; on B.at; on C.in; in D.in; on答案是B,A為什么不可以
A.on; on B.at; on C.in; in D.in; on答案是B,A為什么不可以
英語人氣：518 ℃時間：2019-08-20 17:33:59
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