单项选择题

______finished his work, he had to stay at home on the weekend.

A．Having not been
B．Being not
C．Not having
D．Having not
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单项选择题
After years of hard work, these researchers have at last discovered a new ______ to cancer treatment.
A．approach
B．method
C．channel
D．route
单项选择题
She is______kind a girl that all of us like to make friends with her.
A．such
B．that
C．so
D．what
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