单项选择题

A．Collecting objects on the beach.
B．Creating models of different shapes.
C．Mapping currents in the ocean.
D．Tracking water pollution.
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单项选择题
The children's behavior in the last paragraph ______.
A．can be best explained by behaviorism
B．can be linked to Pavlov's dogs
C．shows that rewards may well kill desire
D．serves to provide evidence to behaviorism
单项选择题
Behaviorism basically believes in ______.
A．motivation
B．performance
C．rewards
D．human factors
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