What did she do after she left school
很明显用的是一般过去时态
left school是发生在（what ）she did之前,那么一定是left,而不是leave,leave是一般现在时.问题是有个did在啊，那么就应该用leave举个例了she uesd to be short如果来问的话应该是what did she use to look like而不是用 what did she used to look like吧难道要前后一致？哈哈，She used to be short. 应该是这么问的 What she used to be？