单项选择题

You may conclude from this article that it is ______ using machines to make a person breathe for years if his brain is dead.

A．a clever way
B．a wise way
C．no use
D．quite useful
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单项选择题
The ______ has become extremely tense. A war could break out any time between the two sides.
A．pollution
B．friendship
C．situation
D．condition
单项选择题
--Would you like a coffee--______.
A．Yes, please
B．I like coffee very much
C．Yes, I prefer tea
D．Thank you very much
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