He's already back to Australia,(.(.).He is on a visit to Sha

问题描述：

He's already back to Australia,(.(.).He is on a visit to Shanghai.A.isn't he;No ...
He's already back to Australia,(.
(.).He is on a visit to Shanghai.
A.isn't he;No
B.hasn't he;Yes
C.isn't he;Yes
D.hasn'he;No
正确答案是A,可是为什么要用isn't he,不用hasn't he

1个回答分类：英语 2014-09-17