单项选择题

Being able to move gives animals many advantages, but it also generates its own demands. For any animal, ______ movement can be unhelpful or even dangerous.

A．ransom
B．retrieve
C．random
D．redeem
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单项选择题
The performance was staged by a group of ______ who have been studying dramatics as a hobby.
A．professionals
B．amateurs
C．playwrights
D．novices
单项选择题
You are afraid to attack him directly. You, therefore, are resorting to ______.
A．criticism
B．condemantion
C．innuendo
D．effrontery
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