The word "contingent" in the third paragraph probably means______.
A. dependent
B. consecutive
C. determined
D. continual
查看答案
One of the reasons why commercials are able to attract viewers' attention is that______.
A. the human voices in commercials have more auditory impact
B. people like cheerful songs that change dramatically in sound quality
C. high-frequency sounds are used to mask sounds that drown out the primary message
D. they possess sound qualities that make the viewers feel that something unusual is happening
John's mother couldn't send him to school because she would still be sleeping.
A. Right.
B. Wrong.
C. Doesn't Say.
A．muchB．littleC．someD．any
A. much
B. little
C. some
D. any
A．forB．withoutC．withD．in
A. for
B. without
C. with
D. in
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