问题补充:
The time is not far away when mobile phones widespread in China’s vast countryside.
A. will become
B. become
C. shall become
D. have become
答案:
(答案→)A. will become
B. become
C. shall become
D. have become
解析:该题易误选B,将when引导的从句误看作时间状语从句,谓语动词用一般现在时表示将要发生的动作。但本句中的when 引导的是定语句,故用一般将来时表示将要发生的动作,will become符合题意。