单项选择题

According to the author, the most important social factor in purchasing process is

A. reference groups.
B. social classes.
C. culture.
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单项选择题
A. claimingB. regrettingC. washingD. watchingE. drinkingF. playingG. depositingH. toasting

A. claiming
B. regretting
C. washing
D. watching
E. drinking
F. playing
G. depositing
H. toasting
填空题
The course is intended for those with a background in personal management.（）
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