The time is not far away ________ modern communications will bec

The time is not far away ________ modern communications will become widespread in China’s vast countryside.
A、when
B、as
C、until
D、before
【正确答案】：A
【题目解析】：因为先行词是the time，且在定语从句中作状语，所以用when引导。此题的先行词与定语从句被主句谓语分开了，要善于辨别。