单项选择题


A．dawning
B．origin
C．derivation
D．foundation
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单项选择题
A．increasingB．promotingC．enhancingD．aggravating
A．increasing
B．promoting
C．enhancing
D．aggravating
单项选择题
A．wideningB．stretchingC．enlargingD．broadening
A．widening
B．stretching
C．enlarging
D．broadening
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