单项选择题

______ halfway through the experiment, there was a power failure and the teacher told us to stop.

A．When we were only
B．Being only
C．When only
D．Having been
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单项选择题
______, the new medicine is now in mass production.
A．With the solved problem
B．With this problem being solved
C．With the problem solved
D．With this problem to solve
单项选择题
His carelessness ______ her failure in the exams.
A．resulted from
B．resulted
C．resulted in
D．resulted to
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