2018年6月英語四級閱讀答案：試卷三仔細閱讀1（新東方版）
46.A.Not all of them are symptoms of dementia.
47.C.Communication within our brain weakens.
48.B.Inability to recall details of one’s life experience.
49.C.Turn to a professional for assistance.
50.D.Staying active both physically and mentally
