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单项选择题

A．Winter is his favorite time for sports.
B．Sports are quite important to him.
C．He should be more enthusiastic.
D．He plays better than he used to.
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单项选择题By saying that using the computer for interpersonal communication was a reinvention (in the second paragraph), the author means that ______.

A．the use of an v-mail represented a big leap in computer application
B．the computer technology was readily adaptable to recreational activities
C．computer-to-computer information had to be digitalized before it was sent out
D．the computer had to go through big technological innovations before it was used for interpersonal communication

单项选择题In discussing the marketing concept, the author focuses on______.

A．its social impact
B．its theoretical basis
C．its possible consequence
D．its main characteristic