【单选题】
The two delegates had an in-depth exchange of views on how to enhance their ______ cooperation.
A.ethical
B.bilateral
C.mandatory
D.subsidiary
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根据网考网移动考试中心的统计,该试题:
20%的考友选择了A选项
71%的考友选择了B选项
3%的考友选择了C选项
6%的考友选择了D选项