单项选择题

Obviously, the Chairman's remarks at the conference were ______ and not planned.

A．substantial
B．spontaneous
C．simultaneous
D．synthetic
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单项选择题
Some criminals were printing ______ dollar bills until they were arrested.
A．decent
B．fake
C．patent
D．artificial
单项选择题
The local police are authorized to ______ anyone's movements as they think fit.
A．pause
B．halt
C．repel
D．keep
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