My father was reading newspapers__my mother was cooking 填when还是while
问题描述：
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
答
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.