Questions 18-24Complete the summary by using words and phrases from the list provided in the box below. Write your answers in boxes 18-24 on your Answer Sheet.NOTE: there are more words than you need. You may use any word or phrase more than once.functions victims genetic predisposition limitedfuture examined unexpected links absentslowed short term been indicating movementdecteased gets smaller characteristics discoveredAlzheimer’s disease is an illness that robs its victims of memory, personality and finally all cognitive function. It does not affect (18) . It is impossible to predict how the disease will progress because its (19) vary greatly. Diagnosis in the early stages is difficult because symptoms resemble the consequences of normal aging and can also be the result of a number of other unrelated ailments. There is no hope for a cure in the (20) and once someone has the disease, its progression cannot be (21) . The percentage of people contracting Alzheimer’s disease increases with age. Ongoing research has been conducted in the form of The Nun Study which has (22) the physiological changes and lifestyles of 678 nuns in America from 1986. The study has been criticised because some of the factors that may lead to Alzheimer’s disease were (23) in the nuns’ lives. Nonetheless the study provides invaluable data. The study has isolated connections between lifestyle and Alzheimer’s disease that occur independently of (24) . 21（）