单项选择题


A．so
B．since
C．although
D．but
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单项选择题
A．properlyB．completelyC．roughlyD．approximately
A．properly
B．completely
C．roughly
D．approximately
单项选择题
A．responsibilityB．adviceC．dutyD．pleasure
A．responsibility
B．advice
C．duty
D．pleasure
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