单项选择题

There are still some ______ for students of science and engineering, but those in arts and humanities have been filled.

A．positions
B．vacancies
C．applications
D．categories
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单项选择题
There is scientific evidence to support our ______ that being surrounded by plants is good for health.
A．instinct
B．implication
C．perception
D．conception
单项选择题
Many artists believe that successful imitation, far from being symptomatic of a lack of originality, is the step in learning to be ______.
A．elegant
B．confident
C．creative
D．imaginary
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