In a sense,we are( )the( )of national boarders in many areas of economic activity in the world today. ( 章节：4 难度：4)_做题室

单项选择题In a sense,we are( )the( )of national boarders in many areas of economic activity in the world today. ( 章节：4 难度：4): A、witness;vanishing; B、witnessing;vanish; C、witness;vanish; D、witnessing;vanishing

正确答案：D
答案解析：
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