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He must have learn English for three years,___?A.hasn't he B.haven't he C.mustn't he D.didn't he要理由,谢谢

题目详情
He must have learn English for three years,___?
A.hasn't he B.haven't he C.mustn't he D.didn't he
要理由,谢谢
▼优质解答
答案和解析
a 只有当主语为第一人称时,反义疑问才能用情态动词