反义疑问句：They felt unhappy,_________?

题目

反义疑问句：They felt unhappy,_________?
They felt unhappy,_________?
A.x05didn’t they B.did they C.don’t they D.do they

答案

答案：A
1、根据“前肯后否,前否后肯”原则,排除BD答案.
2、再根据时态一致的原则,排除C答案.
3、综上所述,正确答案是A.