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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1043

The Diaoyu islands have been part of China's territory since ancient times, ________ as important fishing grounds of Taiwan.

A.served B.to serve
C.serving D.having served
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TheDiaoyuislandshavebeenpartof