单项选择题

The illness from which Mary is suffering has now been ________ as hepatitis(肝火).

A．diagnosed
B．determined
C．deduced
D．discovered
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单项选择题
That's the reason ________ Ann could not do her part of the job.
A．that
B．of
C．because
D．why
单项选择题
Consumers should do ________ than simply complain about the poor quality of goods.
A．much less
B．some more
C．far less
D．far more
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