单项选择题

The intensity of noise can be measured by ______.

A．its effect on people's hearing
B．its decibel
C．how much it affects people psychologically
D．how long it lasts
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单项选择题
The examples given of types of classified advertisement are mentioned EXCEPT ______.
A．houses for sale
B．people who are asking for help
C．something that has been lost
D．job vacancies
单项选择题
What sort of attitude do people have when they look at classified advertisement, according to the writer
A．They are in the frame of mind to buy anything.
B．They are looking for something they need.
C．They feel lost because there are so many advertisements.
D．They feel the same as when they look at display advertisements.
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