One in three British people born this year will get dementia(痴呆) in their life. Dementia is when the brain no longer works properly because of illness, old age or injury. People have problems remembering things. Their personality changes and they forget how to do many everyday things. An illness charity(慈善机构） said dementia would affect（感染） 27 percent of boys and 37 percent of girls born this year. This could cause a health problem as everyone gets older. There is no effective ways to slow down or stop dementia. The charity said governments must do more research. 

A professor on dementia spoke about how serious the problem is. Dr Matthew Norton said: "More and more people will have dementia in the future if action is not taken now." He added, "Dementia is our greatest medical challenge and if we are to beat it, we must invest in research to find new treatments." Around 36 million people have dementia in the world. About 10 percent of us get it in our life. The number will increase as people live longer. The most common form of dementia is Alzheimer's(老年痴呆症). This causes the brain to damage so it cannot function properly.

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1.One in three British people born this year will get ___ in their life.

A headache

B heart disease

C dementia

D cancer

解析：选C。细节理解题。根据第一段第一句One in three British people born this year will get dementia(痴呆) in their life.可知，故选C。

2.Which can NOT cause dementia?

A Friendship.

B Illness.

C Old age.

D Injury.

解析：选A。细节理解题。根据第一段第二句...because of illness, old age or injury.可知，故选A。

3.How many girls will be affected by dementia this year according to the charity?

A 10%.

B 27%.

C 36%.

D 37%.

解析：选D。细节理解题。根据第一段倒数第二行An illness charity said dementia would affect 27 percent of boys and 37 percent of girls born this year.可知，故选D。

4.Which word in the passage can replace the underlined word “function”?

A suffer.

B work.

C affect.

D develop.

解析：选B。语义猜测题。从文中内容可知最后一句与第一段第二句中Dementia is when the brain no longer works properly意思相近，故选B。

5.What's the best title for the passage?

A Poor old people.

B The battle against dementia.

C Our bad future.

D Our challenge in the future.

解析：选B。主旨大意题。文章主要围绕老年痴呆症这个话题展开，故B项“防老年痴呆之战”契合题意，故选B。