单项选择题


A．before
B．when
C．because
D．therefore
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单项选择题
A．byB．forC．uponD．from
A．by
B．for
C．upon
D．from
单项选择题
In the author's view, businesses would place a high emphasis on honest dealing because in the electronic world ______.
A．international cooperation would be much more enhanced
B．consumers could easily seek government protection
C．a good reputation is a great advantage in competition
D．it would be easy for consumers to complain
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