单项选择题


A．placed
B．based
C．imposed
D．introduced
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单项选择题
A．whereasB．ifC．whileD．although
A．whereas
B．if
C．while
D．although
单项选择题
A．mediatingB．negotiatingC．associatingD．accommodating
A．mediating
B．negotiating
C．associating
D．accommodating
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