单项选择题


A．why
B．which
C．when
D．that
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单项选择题
A．inquiredB．interviewedC．investigatedD．interfered
A．inquired
B．interviewed
C．investigated
D．interfered
单项选择题
A．commonB．averageC．ordinaryD．normal
A．common
B．average
C．ordinary
D．normal
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