单项选择题

There has been a great increase in retail sales, （）

A．does there
B．isn't there
C．hasn't there
D．isn't it

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单项选择题
Although a teenager, Fred could resist（）what to do and what not to do.

A．being told
B．telling
C．to be told
D．to tell
单项选择题
He is always here; it's （） you've never met him.

A．unique
B．strange
C．rare
D．peculiar
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