—What’s the matter with you? — the window my finger was cut unexpectedly.A. CleaningB. T

问题补充：

—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

答案：

A. Cleaning

B. To clean

C. While cleaning

(答案→)D. While I was cleaning

解析：句意：——你怎么啦？——当我擦窗户的时候，我的手指被无意刮了一下。根据句子结构，逗号前的部分应该是状语，句子的主语是my finger,而clean的逻辑主语应该是I，不能使用状语从句的省略，排除C，而现在分词作状语，它的逻辑主语就是句子的主语。故排除A，不定式作状语位于句首时往往做目的状语，故排除B，D答案是由while引导的时间状语从句。