单项选择题

A haphazard knowledge of several styles of a language may be worse than useless if we do not know the type of occasion on which each is appropriate or if we do not know when we are sliding from one of another.

A．causal
B．disorganized
C．systematic
D．unplanned
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单项选择题
Realizing that many readers find long descriptive passages uninteresting, Bruce began his story with an exciting conflict.
A．melancholy
B．tedious
C．incredible
D．offensive
单项选择题
Ted got a better job and left the school before Mrs. Wolcox had him expelled.
A．disgraced
B．degraded
C．executed
D．ejected
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