问题描述：
高三英语语法题一道
It was an unforgettable accident that the luxurious ocean liner sank while____the Atlantic.
A.crossing B.crossed C.being crossed D.having crossed
选哪个.为什么
It was an unforgettable accident that the luxurious ocean liner sank while____the Atlantic.
A.crossing B.crossed C.being crossed D.having crossed
选哪个.为什么
问题解答：
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