单项选择题


A．has been
B．was being
C．has
D．was
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单项选择题
A．stabilizesB．sweepsC．pedalsD．confirms
A．stabilizes
B．sweeps
C．pedals
D．confirms
单项选择题
A．perceivedB．agreedC．matchedD．reckoned
A．perceived
B．agreed
C．matched
D．reckoned
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