单项选择题

A．They have store detective.
B．They have big signs up, saying "Shoplifters will be prosecuted."
C．They use close- circuit television.
D．All of the abov
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单项选择题
A．He does not like it.B．He has a toothache.C．He wants to save it.D．He has trouble eatin
A．He does not like it.
B．He has a toothache.
C．He wants to save it.
D．He has trouble eatin
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We can judge whether a company is seeking a monopoly by seeing its ______.
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