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----your sister ____ to London to study english .Is that tru

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----your sister ____ to London to study english .Is that true
----yes,she ____ there for two months.
A.has been ,has been B.has gone ,has been
这两个选项有什么区别,运用什么语法.第一个空似乎两选项都行.
----your sister ____ to London to study english .Is that tru
B
have been to...已去过.(含义:现在已回来)
have gone to .已去.了(含义:现在在那儿或在去那儿的路上)
She has been there for two month(她已去了两个月了)本意:她已在那儿两个月了.
go为非延续性动作,不能与【一段时间】连用,故夲句用了其状态表示.