the festival of halloween had its origin as an event in m___of the dead
问题描述：
the festival of halloween had its origin as an event in m___of the dead
答
memory.
in memory of为了纪念
The festival of halloween had its origin as an event in memory of the dead
万圣节起源于纪念故人的活动.
They built a monument in memory of George Washington.
他们建了一座纪念碑以纪念乔治·华盛顿.