单项选择题


A．consisted
B．illustrated
C．involved
D．formed
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单项选择题
A．alwaysB．sometimesC．oftenD．never
A．always
B．sometimes
C．often
D．never
单项选择题
A．equallyB．spontaneouslyC．graduallyD．correspondingly
A．equally
B．spontaneously
C．gradually
D．correspondingly
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