30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Be

题目简介

30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Be

题目详情


30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Beijing.
A.openedB.was openedC.being openedD.to be opened
题型:单选题难度:偏易来源:不详

答案

A

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