问题描述：
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
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
问题解答：
我来补答展开全文阅读