单项选择题

A．He lost a button at work.
B．He doesn’’t know where he put the calculator.
C．He thinks he broke something the woman lent him.
D．He’’s not sure how to solve the math problem.
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单项选择题
A．A stormy ocean.B．Calm water.C．Golden sand.D．Little waves.
A．A stormy ocean.
B．Calm water.
C．Golden sand.
D．Little waves.
单项选择题
Which of the following in support of the finding that people tend to perform worse,...when a reward is involved ( last paragraph )
A．People are not used to being conditioned by prizes.
B．Rewards, like punishments, are attempts to control behavior.
C．Rewards are so indispensable to American cultures.
D．The principle of "positive reinforcement" in not fully enforced.
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