A) decrease gradually
B) remain at the same level
C) become unstable
D) improve enormously
27. The first paragraph tells us that a new product is ________.
A) not easily accepted by the public
B) often inferior to old ones at first
C) often more expensive than old ones
D) usually introduced to satisfy different tastes
28. Marketers need to know which of the four stages a product is in so as to ________.
A) promote its production
B) work out marketing policies
C) speed up its life cycle
D) increase its popularity
29. The author mentions the example of backpacks to show the importance of ________.
A) pleasing the young as well as the old
B) increasing usage among students
C) exploring new market sections
D) serving both military and civil needs
30. In order to recover their share of the world market, U.S. auto makers are ________.
A) improving product quality
B) increasing product features
C) modernizing product style
D) re-positioning their product in the market
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