The Apirport Railway has been ____mid-1998.A.operating B.operate C.operated D.to perate

分类: 作业答案 • 2021-12-31 13:35:59

问题描述：

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

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