单项选择题


A．might have learned
B．could have learned
C．has learned
D．learned
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单项选择题
A．easinessB．finenessC．coarsenessD．carelessness
A．easiness
B．fineness
C．coarseness
D．carelessness
单项选择题
A．namelyB．or ratherC．neverthelessD．still
A．namely
B．or rather
C．nevertheless
D．still
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