单项选择题

This is a new model of ______ computer especially designed to meet the needs of traveling businessmen.

A．portable
B．mobile
C．flexible
D．convenient
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单项选择题
The first sentence of the passage suggests that ______.
A．there is a connection between behavior and desired aims
B．the need to achieve is man's strongest driving force
C．satisfactory behavior is a product of motivation
D．we can assume that behavior is .dependent upon motivation
单项选择题
Some people ______ avoid questions of right or wrong and remain neutral about them.
A．thoughtfully
B．deliberately
C．appropriately
D．virtually
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