单项选择题

Human behavior is mostly a product of learning, whereas the behavior of an animal depends mainly on______.

A．consciousness
B．impulse
C．instinct
D．response
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单项选择题
The totally new-branded printer is______ with all leading microcomputer software.
A．comparable
B．compatible
C．competitive
D．comparative
单项选择题
According to the latest survey, George W. Bush Jr. doesn't have a chance to win the re election. Almost all of the people in the country vote for his______.
A．candidate
B．opponent
C．alternative
D．enemy
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