单项选择题

We have to try every means to ______ the costs of the project.

A．bring off
B．bring up
C．bring down
D．bring back
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单项选择题
Professor King's book will show you ______ can be used in other context.
A．that you have observed
B．that how you have observed
C．how that you have observed
D．how what you have observed
单项选择题
This may have preserved the antelope from being wiped out as well as other animals ______.
A．hunted
B．hunting
C．that hunted
D．are hunted
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