Many Chinese shed tears at the Beijing Olympics Opening Ceremony because many years passed(见下方)

问题描述:

Many Chinese shed tears at the Beijing Olympics Opening Ceremony because many years passed(见下方)
( )we realized our dream.
A.when B.that C.before D.since
该题正确答案应选C,说明其他几项为什么不对,

一段时间+before,表示过多久···才···
not+ 一段时间+before ,表示没多久···就···
这里是说过很多年之后我们才实现梦想,所以选C