单项选择题

What's the main idea of the passage

A．Online advertising is more effective than TV advertising.
B．Google and Yahoo! are challenging Microsoft in the field of advertising.
C．Google's new advertising service could make the internet an even more valuable marketing medium.
D．Online advertising is popular with advertisers.

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单项选择题

By saying It will represent a 'watershed moment' in the evolution of the internet as an advertising medium , the trade magazine suggests

A．Google and Yahoo! share advertising revenues with television networks.
B．The success of Google and Yahoo lakes a turning-point to online advertising.
C．America's three big television networks play an important role in the development of advertising medium.
D．Google and Yahoo! build up their status in advertising.

单项选择题

Now, the most effective form of advertising is ______.

A．a 30-second prime-time TV ad
B．a 30-second prime-time online advertising
C．online advertising
D．most expensive TV ad