1.though my aunt pursued what was,in those days,an enlighten

1.though my aunt pursued what was,in those days,an enlightened policy.此句 的 what 引导的宾语从句 为什么是 疑问句 的语序.这样的句型属于什么知识范畴内的,我去查下,看下更多例句.
类似的 bottles were stacked in what had once been Bessie's wardrobe.
2.2.during that time she so gained my aunt's confidence ,that she was put in chatge of the domestic staff 此句的 so 是不是副词 ,为什么引导so...that 句型.so 本来是应该修饰形容词副词的啊,为什么这里是修饰动词gain.
3.3.she suspected lawn mower would otherwise remain unrepaired and the grass uncut有 suspect sth +adj句型?就是说she suspected the grass uncut?