单项选择题

The young inventor wants to take out a ________ on his new type of printing machine.

A．privilege
B．precaution
C．patent
D．monopoly
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单项选择题
The audience disliked the film thoroughly and were ________ by whistling and stamping the feet.
A．defying
B．protesting
C．refusing
D．refuting
单项选择题
A sheet of metal can be shaken to ________ thunder.
A．stimulate
B．forge
C．fabricate
D．simulate
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