单项选择题The presence of armed guards ______ us from doing anything disruptive.

A.defeated
B.irritated
C.prevented
D.encouraged


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1.单项选择题The modern age is a permissive one in which things can be said explicitly, but the old traditon of ______ dies hard.

A.talkativeness
B.exaggeration
C.condemnation
D.euphemism

10.单项选择题Consider the universal cannibalism of the sea, all of whose creatures ______ one another.

A.hide from
B.ferret out
C.prey on
D.compete against