问题描述：
_ What's the matter with you ___While I was cleaning the window ,
--What’s the matter with you?
--_____ the window,my finger was cut unexpectedly.
A.Cleaning B.To clean
C.While cleaning D.While I was cleaning 这几个答案选哪个?为什么不能选B?请详细说明,
--What’s the matter with you?
--_____ the window,my finger was cut unexpectedly.
A.Cleaning B.To clean
C.While cleaning D.While I was cleaning 这几个答案选哪个?为什么不能选B?请详细说明,
问题解答：
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