问题
选择题
_______ the window, my finger was seriously cut.
A．Having cleaned
B．To clean
C．While cleaning
D．While I was cleaning
答案
D
本题考查非谓语动词用法。因为手指受伤与擦玻璃同时进行，所以A项不对；又因为主句主语是my fingers,所以不能选C项。
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