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英语
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The Apirport Railway has been ____mid-1998.A.operating B.operate C.operated D.to perate
为什么选C，请具体说明
人气：458 ℃ 时间：2020-04-27 01:04:08
解答
C 过去完成
这条铁路从1998年年中就已经开始运转了
过去完成时态
has been＋过去分词
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