单项选择题

How many drugs tests will be conducted before the Salt Lake Olympic Games

A．4, 700.
B．1,200.
C．3,500.
D．2, 300.
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He gained his ______ by painting ______ of famous writers.
A．wealth; work
B．wealths; works
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Is John coming by trainHe should, but he ______ not. He likes driving his car.
A．must
B．can
C．need
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