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
Susan will come to watch him ______at Wimbledon this week.
A．played
B．play
C．to play
D．playing
单项选择题
This crop does not do well in soils _____the one for which it has been specially developed.
A．outside
B．other than
C．beyond
D．rather than
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