单项选择题

All specialists agree that the most important consideration with diet drugs is carefully ______ the risks and benefits.

A．valuing
B．evaluating
C．estimating
D．weighing
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单项选择题
The ______ of snake is simply this: a legless reptile with a long, thin body.
A．connotation
B．denomination
C．donation
D．denotation
单项选择题
What we consider a luxury at one time frequently becomes a ______, many families find that ownership of two cars is indispensable.
A．fashion
B．necessity
C．proclivity
D．nuisance
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