单项选择题

The old man was seriously ill for a time, but with careful nursing he managed to ______.

A．pull off
B．pull through
C．get off
D．get through
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单项选择题
It will be hard for anyone to replace Mr. Ned, who is the ______ of the company.
A．mental
B．comprehension
C．brain
D．attendance
单项选择题
Unlike science, progress in technology must be measured in terms of the human factor. Technology must be our slave and ______.
A．not the reverse
B．not the version
C．not the same
D．not the prejudice
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