单项选择题

According to the passage, economists define "opportunity cost" as"________".

A．an opportunity given up in terms of cash
B．the cost of a better choice measured in terms of cash
C．giving up a specific choice for the next best alternative
D．the cost of a specific choice measured in terms of any alternative choice

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单项选择题

To achieve success in your career, the most important factor, according to the passage, is to________.

A．project a favorable image to the people around you
B．perform well your tasks given by your superiors
C．let your superiors know how good you are
D．work as a consultant to your superiors

单项选择题

The author is of the opinion that Coleman's beliefs are________.