单项选择题

Professor Smith' s new invention has created a great ______ on the campus.

A．sensation
B．selection
C．imitation
D．irrigation
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单项选择题
Mike lost his ______on the bike and fell off.
A．equation
B．equivalence
C．equilibrium
D．equality
单项选择题
I don' t believe such a strange story. I am certain it is a complete______.
A．fabrication
B．lubrication
C．synthesis
D．generalization
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