单项选择题

It is postulated that a cure for the disease will have been found by the year 2000.

A．challenged
B．assumed
C．deducted
D．decreed
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The once barrenhillsides are now good farmland.
A．hairless
B．bare
C．empty
D．bald
单项选择题
The manager allocateduties to the clerks.
A．assign
B．persuade
C．ask
D．order
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