单项选择题

We learn from the last paragraph that ______.

A．Internet businesses are headed downhill due to the slump in Internet economy
B．even with a change in advertising practices, Internet businesses cannot survive the current crisis
C．older businesses will overcome the Internet companies in the future
D．the future of Internet business is currently unpredictable
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单项选择题
Speaking of the new methods of advertising on the Internet, the author implies that ______.
A．banners and other Internet advertising methods are and will continue to boost sales
B．banners are beginning to lose their advertising efficiency
C．although these new methods offer a boost in the short run, more traditional methods are superior
D．they must, just like traditional methods, change over time to remain effective
单项选择题
Von Houten' s contribution to the development of chocolate is important because it ______.
A．produced chocolate in a form never seen before
B．increased the marketability of chocolate as a consumer good
C．improved the taste of chocolate
D．made chocolate available to more people, speeding its growth
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