The day is not far away___modern communication will become wide spread in China's vast countryside.

问题描述:

The day is not far away___modern communication will become wide spread in China's vast countryside.
A.when B.as C.until D.before 为什么不是B?

翻译为现代科技在中国广大的农村地区普及的日子不会太远.when用来指代the day