单项选择题

A．American literature.
B．Elementary education.
C．Art history.
D．Experimental medicine.
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单项选择题
A．Not everyone from England likes to read all the time.B．People who teach English like things besides book.C．The English like to read a lot and listen to music.D．English teachers usually like to read a lot.
A．Not everyone from England likes to read all the time.
B．People who teach English like things besides book.
C．The English like to read a lot and listen to music.
D．English teachers usually like to read a lot.
单项选择题
In the passage, the author is trying to tell us ______.
A．how TV ads vary vocal sounds to attract attention
B．how the loudness of TV ads is overcome
C．how advertisers control the sounds properties of TV ads
D．how the attention-getting properties of sounds are made use of in TV ads
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