单项选择题

Questions 26-30 are based on the following table:

Which group showed the greatest change over the 20 years（）

A．Single men.
B．Single women.
C．Married men.
D．Married women.

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单项选择题
The percentage of females out of marriage in 2011 was （）

A．26
B．34
C．35
D．48
单项选择题
The purpose of the author in writing this article is to _____________.
A．reveal marketing tricks
B．explain the working theory of ads
C．advise people against over-spending
D．analyze consumer behavior
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