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单项选择题

What does the "invisible hand" refer to

A．Supply and demand.
B．Laissez faire.
C．Self-interest.
D．Non-interference from the government.

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单项选择题How do students find out about water pollution

A．They consult pollution experts.
B．They collect water samples.
C．They conduct species surveys.
D．They read books on pollution.

单项选择题In Smith's view, monopolies ______.

A．will lead to the maximization of production
B．can hardly realize the checks and balances of competition
C．may bring about high production and low demand
D．will not benefit society in the long run

单项选择题According to the author, Green EFL has all of the following advantages EXCEPT that ______.

A．students will be better able to meet challenges in the future
B．students learn the target language with less difficulty
C．students can achieve a better understanding of the environmental problems
D．students will acquire cultural values like "Americanness" and "Englishness"

单项选择题The topics of the Green EFL program probably will NOT include ______.

A．going on a diet
B．recycling
C．farm animals
D．jazz music

单项选择题The aggressive act usually takes all of the following forms EXCEPT ______.

A．overeating
B．suicide
C．hitting back directly
D．displacement