单项选择题

The bad weather will ______ our plans by three weeks.

A．destroy
B．pull back
C．spoil
D．Set back.
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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
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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