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

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单项选择题
The issue （）at the conference is very important and it will create a sensation nationwide.

A．discussed
B．being discussed
C．is being discussed
D．has been discussed
单项选择题
The captain of the ship （）the passengers that there was no danger.

A．assured
B．ensured
C．secured
D．insured
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