单项选择题

The new currency will get into （）soon.

A．circuit
B．circulation
C．circular
D．circle

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单项选择题

Many old people in the cities find themselves unable to get used to the rapid （）of city life.

A．rate
B．speed
C．step
D．pace

单项选择题

Millions of Americans flock to their drugstores to buy vitamins and minerals, （）that these pills can help to prevent serious illnesses.

A．convincing
B．convinced
C．to convince
D．to be convinced

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