单项选择题

It is easy for scientists to understand the significance of the doctor's findings.

A．complexity
B．simplicity
C．clearness
D．importance
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单项选择题
For three months, the city was in turmoil due to serious unemployment.
A．disorder
B．influence
C．impact
D．inquiry
单项选择题
The examination was quite exhausting because of its difficulty and length.
A．long
B．exciting
C．tiring
D．refreshing
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