问题描述：
提问一道英语选择
The train _____ she was traveling was late.
A.which B.where C.on which D.in that
是选C,为什么不选A,
The train _____ she was traveling was late.
A.which B.where C.on which D.in that
是选C,为什么不选A,
问题解答：
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