Linda was ill.so she didn't go to work yesterday.(对划线部分提问Lin

Linda was ill.so she didn't go to work yesterday.(对划线部分Linda was ill提问）
Why didn't Linda go to work yesterday?
为什么昨天Linda没去上班?
Her parents are going to Qingdao by plane.(对划线部分by plane提问）
How are her parents going to Qingdao?
她父母怎样去青岛?
Mary found a big bag in front of the house.(改为一般疑问句)
Did Mary find a big bag in front of the house?
玛丽在房子前面发现一个大包吗?