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He's already back to Australia,_____?________.He is on a visit to shanghai .A isn't he ; noB hasn't he ; yesC isn't he ; yesD hasn't he; no这里的He‘s 不是 He has 有already 不是完成时?

题目详情
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't he; no
这里的He‘s 不是 He has
有already 不是完成时?
▼优质解答
答案和解析
不是.
如果是现在完成时,必须有 done ,而这里中有back (是副词),没有动词的过去分词形式