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:有
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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)
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