单项选择题

______ the window, my finger was cut unexpectedly.

A．Cleaning
B．To clean
C．While cleaning
D．While I was cleaning
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--I fell off my bicycle and broke my leg yesterday.--Is that ______ you drank too much
A．why
B．how
C．because
D．when
单项选择题
______ the window, my finger was cut unexpectedly.
A．It
B．As
C．That
D．What
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