问题描述：
一道英语题-Has you former classmate come back from America?-Yes,he__there for eight years.A.
一道英语题-Has you former classmate come back from America?
-Yes,he__there for eight years.
A.has stayed B.stayed为什么选B而不能用A?
一道英语题-Has you former classmate come back from America?
-Yes,he__there for eight years.
A.has stayed B.stayed为什么选B而不能用A?
问题解答：
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