while引导的从句(选择题)

The singer is singing happily ( ) guitar crazily.
A.while playing the B.while he played the
C.while playing D.while he played
选B怎么不行了,从句啊

while引导的从句(选择题) 有while引导的句子是不是让步状语从句 when while as soon as 引导的从句的时态问题 when 和while引导的状语从句中有什么区别 while 从句when 从句的区别？ if 引导的从句 whose引导的从句 where引导的从句 由when, while引导的时间状语从句什么时候要用进行时啊？举个例子 定语从句的选择题