单项选择题


A．ahead
B．certain
C．full
D．free
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单项选择题
A．regularlyB．reasonablyC．rationallyD．securely
A．regularly
B．reasonably
C．rationally
D．securely
单项选择题
A．scatteringB．preservingC．discardingD．recycling
A．scattering
B．preserving
C．discarding
D．recycling
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