单项选择题

Many experts remain （skeptical） about his claims.

A．untouched
B．certain
C．doubtful
D．silent
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单项选择题
Rumors began to （circulate） about his financial problems.
A．send
B．hear
C．confirm
D．spread
单项选择题
The police will need to keep a （wary） eye on this area of town.
A．naked
B．cautious
C．blind
D．private
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