单项选择题

The word "convince" in the passage means ______.

A．cause someone to believe
B．prove
C．make someone understand
D．ensure
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单项选择题
Which of the following is an appropriate title for the passage
A．The Family Life of Americans.
B．Public Service and Advertisers.
C．The Influence of Advertising.
D．Brand Names and Public Pleasure.
单项选择题
The author develops his main idea by ______.
A．demonstrating how brand names become household names
B．giving examples from the advertising world
C．warning the public about certain unfair advertising techniques
D．demonstrating how advertisers perform a public service
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