B. will make people discover dementia

　　C. will affect the brain growth in many ways

　　D. will help to treat some diseases in nerve system

　　3. From the last paragraph，we can know that ______

　　A. the technique provided by HRT is immature

　　B. animal tests are no longer allowed by law

　　C. a million people suffer from brain diseases

　　D. the research program lacks financial support

　　4. The text is intended to ______.

　　A. tell us about a breakthrough in medical research

　　B. introduce a research program in human's brain

　　C. introduce the progress of drugs for dementia

　　D. tell us about health problem in nerve system

　　【参考答案】1—4、CDDB

　　【由北京市丰台区2017高考模拟改编】

　　阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

　　What is so amazing about giving blood?

　　The National Blood Service, which covers all of England and North Wales, needs nearly two and a half million blood donations each year. When you give blood, you’ll be doing one of the most amazing things anybody could dream of — saving a life.

　　___________________________

　　All types of blood are needed —not just rare ones. In fact, the commoner the blood type, the more are needed. So even if your blood is one of the most common types — group O for example — you can be sure that by donating three times a year, you really are doing something amazing.

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