单项选择题

In the passage the author wants his marketers to understand that ______.

A．advertising to children must stop
B．a libertarian view in advertising is unethical
C．advertising to children must have a clear purpose
D．children must be treated differently when advertising
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单项选择题
Why does the author assert that through travel We only truly touch one another
A．Because he believes tourism makes it possible for people to help one another.
B．Because he thinks that sincere learning of a culture is only possible by travel.
C．Because he believes travel is the only way which can mix up different cultures.
D．Because he wants to emphasize tourism's powerful effect on combating social problems.
单项选择题
According to the first paragraph, children as an Internet market ______.
A．are becoming increasingly rational
B．are using Internet at an earlier and earlier age
C．have created a growing advertising market
D．are overtaking the adult market due to their spending power
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