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My father was reading newspapers__my mother was cooking 填when还是while答案上选while,但我觉得应选when,原因是我认为when>while

题目详情
My father was reading newspapers__my mother was cooking 填when还是while
答案上选while,但我觉得应选when,原因是我认为when>while
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答案和解析
当然是while了.My father was reading newspapers与my mother was cooking是两个并列的同时发生的动作,用while.