单项选择题

The author implies that Dorothea Cix’s work for the insane was interrupted because of _______.

A．an illness
B．the Civil War
C．her trip to England
D．her grandmother's death
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单项选择题
You may conclude from this article that it is _______ using machines to make a person breathe for years if his brain is dead.
A．a clever way
B．a wise way
C．no use
D．quite useful
单项选择题
When a person's brain is dead, he _____.
A．will never wake up again
B．maybe wakes up again
C．will wake up again by using a machine
D．sometimes wakes up
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