单项选择题

Linda's friends were all concerned ______ books and music.

A．with
B．of
C．for
D．at
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单项选择题
There is a real possibility that these animals could be frightened, ______ a Sudden loud noise.
A．being there
B．there having been
C．there was
D．should there be
单项选择题
Processes in the human body are not in all respects exactly ______ to those 'that can be produced in the experimental animals.
A．comparative
B．comparable
C．competitive
D．compatible
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