单项选择题

A great deal has been done to remedy the situation.

A．maintain
B．improve
C．assess
D．protect
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单项选择题
In Britain and many other countries appraisal is now a tool of management.
A．evaluation
B．production
C．efficiency
D．publicity
单项选择题
These are their motives for doing it.
A．reasons
B．excuses
C．answers
D．plans
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