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
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单项选择题
Why do advertisers like the new auction based service for display advertising
A．Because more people can see the advertisement.
B．Because the service brings them more profit.
C．Because they only pay for results.
D．Because the service offer more flexibility and control.
单项选择题
Which of the following is nor included in Google's new service which extends AdSense
A．Advertisers will be able to select the specific sites where they want their ads to appear.
B．Advertisers pay on the basis of the number of people who browse the ad.
C．Advertisers are offered ads with animation.
D．Advertisers will be advised on the contents.
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