问题描述：
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----You sister ______ to London to study English.Is that true?
----Yes.She _____ there for two months
A.has been,has been B.will go,has gone C.gone,will be D.has go,has been
----You sister ______ to London to study English.Is that true?
----Yes.She _____ there for two months
A.has been,has been B.will go,has gone C.gone,will be D.has go,has been
问题解答：
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