单选题
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
【正确答案】
A
【答案解析】
at the mercy of“任……摆布，在……前毫无办法”符合句意。in lieu of替代；by courtesy of在……的允许下；for the price of不是固定用法。
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