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Iwanttoknowhowlong A．hashebeenb...

问题详情：Iwanttoknowhowlong A．hashebeenback B．hashecomeback C．hehasbeenback D．hehascomeback【回答】C 知识点：状语从句...

问题详情： Iwanttoknowhowlong A．hashebeenback B．hashecomeback C．hehasbeenback D．hehascomeback...