学帮网Helen can't find her backpack.改成同义句改成：Helen doesn't know____her backpack_______.
来源：学生作业学帮网 编辑：学帮网 时间：2024/06/02 17:55:35
Helen can't find her backpack.改成同义句
改成：
Helen doesn't know____her backpack_______.
Helen doesn't know if her backpack is lost.
Helen doesn't know where her backpack is.
where...is