单项选择题

A．Tony’’s secretary.
B．Paul’’s girlfriend.
C．Paul’’s colleague.
D．Tony’’s wife.
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单项选择题
Many commercials begin with a cheerful song of some kind because______.
A．pop songs attract viewer attention
B．it can increase their loudness
C．advertisers want to make them sound different from regular programs
D．advertisers want to merge music with commercials
单项选择题
The author says that the powerful computers of today ______.
A．are capable of reliably recognizing the shape of an object
B．are close to exhibiting humanlike behavior
C．are not very different in their performance from those of the 50’’s
D．still cannot communicate with people in a human language
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