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
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单项选择题
Compared with four-year colleges, community colleges ______.
A．are more attractive to the high-school graduates
B．provide more opportunity to work with local business to identify specific needs
C．are of more importance in boosting economy
D．prepare you to become a manager
单项选择题
According to the author, the following are the function of a junior and community college except ______.
A．it can help you become better equipped to continue education
B．it can help you to learn to face the challenges in life
C．you will learn how to think and learn
D．you will have decision-making classes
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