单项选择题

Millions of Americans flock to their drugstore 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
The newly released movie was______ as to arouse so much sensation among the young people.
A．so
B．such
C．much
D．very
单项选择题
John Smith, being a diligent student, never refuses to______ more responsibilities that are assigned to him.
A．take up
B．take in
C．take off
D．take on
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