计算2002—2007年年平均人数的计算公式是（）。
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From the passage we know that ________.
A. a little worry will do us good if handled properly
B. a little worry will enable us to survive a recession
C. fear strengthens the human desire to survive danger
D. fear helps people to anticipate certain future events
We learn from the last paragraph that ________.
A. the calls for reform. will help promote business ethics
B. businessmen with poor motives will gain the upper hand
C. business ethics courses should be taught in all business schools
D. reform. in business management contributes to economic growth
64__
64 A) putting B) worth C) building D) buying
52 __
A. make B) own C) destroy D) trade
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