单项选择题

According to the passage, which of the following is sound rather than noise

A．A couple's whisper behind you in the cinema.
B．The snore of your roommate.
C．The loud motor- horn in the street.
D．The sound of airplanes taking off and landing when you are waiting to board a plan

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单项选择题

According to the passage, in which way have the elassitied advertisements changed nowadays

A．They depend more on display type.
B．More money is charged for them.
C．They are divided into more groups.
D．They are less formal.

单项选择题

Why have classified advertisements changed in appearance

A．Because people no longer want headlines and pictures.
B．Because real estate advertising is particularly truthful now.
C．Because the increase in the number of such advertisements means they have to be small now.
D．Because there are more advertisements now and more competition among advertisers.