问题描述：
说下为什么选这个答案,和其他错误答案为什么不行~
1.He had to give up the plan,___ he
A did B didn't C does D doesn't
2.They had to walk here,___he?
A.mustn't B did C didn't D.hadn't
1.He had to give up the plan,___ he
A did B didn't C does D doesn't
2.They had to walk here,___he?
A.mustn't B did C didn't D.hadn't
问题解答：
我来补答展开全文阅读