在万圣节是at Halloween还是on Halloween,在儿童节是on children's Day还是at children's Day
问题描述：
在万圣节是at Halloween还是on Halloween,在儿童节是on children's Day还是at children's Day
答
day结尾的一般来说前面为“on”,小窍门：想想星期几（如“on monday”）怎么说
其余的节日为“at”