Maybe you'll discover Earth II ____ .Don't look down new ideas.

问题描述:

Maybe you'll discover Earth II ____ .Don't look down new ideas.
A some day B someday C everyday D some time
请问A和B有什么区别,该选哪个,为什么?

选A
some day 指将来有一天
而someday 是指有一天
A的解释较确切