单项选择题

It is essential that you ______ your study habits if you expect to do well in college.

A．changed
B．change
C．changing
D．will change
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单项选择题
Those who ______ the weather as a conventional opening seem to be ignorant of the reason why human beings wish to talk.
A．dispose
B．dispatch
C．dismiss
D．despise
单项选择题
He is holding a ______ position in the company and expects to be promoted soon.
A．subordinate
B．succeeding
C．successive
D．subsequent
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