单项选择题

The story was said to have been based on the information from a reliable ______.

A．source
B．foundation
C．origin
D．basis
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单项选择题
I'll talk to him, ______ I don't think it will do any good.
A．although
B．which
C．if
D．unless
单项选择题
After being tested in many Ways, this newly-designed machine will ______in the near future.
A．take its place
B．put into use
C．come into use
D．take action
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