单项选择题

Consumers deprived of the information and advice they needed were quite simply ______ every cheat in the marketplace.

A．at the mercy of
B．in lieu of
C．by courtesy of
D．for the price of
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单项选择题
Criticism without suggesting areas of improvement is not ______ and should be avoided if possible.
A．constructive
B．productive
C．descriptive
D．relative
单项选择题
There is only one difference between an old man and a young one: the young one has a glorious future before him and the old one has a ______ future behind him.
A．splendid
B．conspicuous
C．uproarious
D．imminent
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