单项选择题


A．them
B．themselves
C．ourselves
D．ours
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单项选择题
A．practicallyB．pragmaticallyC．precedentlyD．practicably
A．practically
B．pragmatically
C．precedently
D．practicably
单项选择题
A．groupsB．classesC．seriesD．categories
A．groups
B．classes
C．series
D．categories
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