单项选择题


A．has never been
B．has been never
C．have been never
D．have never been
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单项选择题
A．praiseB．honorC．appreciateD．confirm
A．praise
B．honor
C．appreciate
D．confirm
单项选择题
A．pickB．selectC．learnD．study
A．pick
B．select
C．learn
D．study
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