单项选择题

The Beatles was a(n) _________ jazz music band that won a big name in the 1960s.

A．American
B．Canadian
C．Australian
D．British
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单项选择题
A dead patent is one that _________ .
A．no longer wins money
B．has expired
C．is plagiarized
D．is violated
单项选择题
It can be inferred from the passage that _________ .
A．all the ideas "new" to us are actually old
B．some "new" ideas can make money without having to be commercialized
C．all "new" ideas first appeared in the form of a patent
D．some "new" ideas may not bring economic reward to their originators
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