单项选择题

A．knew
B．recognized
C．told
D．realized
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单项选择题
A．fromB．toC．intoD．on
A．from
B．to
C．into
D．on
单项选择题
What is the dual function of advertisements
A．To sell and to inform.
B．To increase prices and competition.
C．To change the means of selling and buying.
D．To take away chances of choosing from customers.
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