单项选择题

Millions of Americans flock to their drugstores to buy vitamins and minerals, ______ that these pills can help to prevent serious illnesses.

A．convincing
B．convinced
C．to convince
D．to be convinced
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单项选择题
In 1914, an apparently insignificant event in a remote part of Eastern Europe ______ Europe into a great war.
A．inserted
B．imposed
C．pitched
D．plunged
单项选择题
When he realized the police had spotted him, the man_____ the exit as quickly as possible.
A．made off
B．made for
C．made out
D．made up
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