两道简单的反意疑问句填空.请说明为什么.
一、there used to be many old trees in my yard,_____?是isn't there 还是didn't there 还是wasn't there 还是 usedn't there
二、the old lady had to deal with things herself,＿＿?是didn't her还是hadn't her 请解释为什么.