单项选择题

All the following share one similarity EXCEPT______.

A．LookSmart
B．CMGI
C．AltaVista
D．Microsoft
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单项选择题
The primary aim of some companies' sponsoring the search engines is to______.
A．cash in on their important role as Web guides
B．boost their avenue
C．reverse a series of losses
D．have their sites visited by the Internet users more
单项选择题
The consumer group complained about______.
A．special fees that Internet users were charged
B．Federal Trade Commission
C．Commercial Alert
D．online search engines
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