单项选择题
It has long been known that total sleep ______ is 100 percent fatal to rats, yet, upon examination of the dead bodies, the animals look completely normal.
A．deposition
B．destruction
C．deprivation
D．reduction
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单项选择题
In that country, hospital doctors don't go sightseeing very often because their work ______ almost all their time.
A．takes up
B．takes off
C．takes apart
D．takes over
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单项选择题
The battle is of great significance when viewed in the ______ of the progress of the war.
A．prospective
B．respective
C．perspective
D．prescriptive
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