单项选择题



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单项选择题
The purpose of the author in writinh this article is to （）.

A.reveal marketing tricks
B.analyze consumer behavior
C.explain the working theory of adds
D.advise people against over-spengding
单项选择题
but only a little bit to put into food for（）.

A.taste
B.smell
C.nutrition
D.health
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