单项选择题


A．that
B．whether
C．when
D．although
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单项选择题
A．arguedB．refutedC．challengedD．rejected
A．argued
B．refuted
C．challenged
D．rejected
单项选择题
A．impatientB．reluctantC．hesitantD．compelled
A．impatient
B．reluctant
C．hesitant
D．compelled
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