For Walker, she's optimistic about her chances.If she has Huntington's disease, she's not worried about passing it on, since she doesn't plan on having kids.The time of her diagnosis won't affect how the disease progresses.Although she admits she would feel more pressure to live her life to the fullest if she were tested positive for Huntington's disease, she's currently living her life as if she won't die in the next couple of decades by this disease."Right now, I feel like my future is wide open and if I got tested and found out I have Huntington's disease.I'd feel like, well, there's my future and there's my fate，" Walker said."Right now I have more time and freedom."

　　语篇解读：Huntington是一种遗传性疾病，尽管这种病对人的寿命有很大影响，但作者通过 Walker 对待这种病的态度告诉读者如何面对疾病。

　　4．Walker might have Huntington's disease because ________.

　　A．she likes to paint and read

　　B．her mother has the disease

　　C．she refuses to take a test

　　D．she often feels anxious and sad

　　解析：选B　细节理解题。从第一段可知她母亲有这种病，这使她有50%的概率得到这种病的基因。

　　5．It can be learned from the passage that ________.

　　A．knowing earlier about the disease will help to cure it

　　B．there is no cure for the disease at present

　　C．there is no way to test if one has the disease

　　D．the disease has no effect on one's life expectancy

　　解析：选B　细节理解题。第二段提到"There is no cure for it or anything right now that even controls the disease well."故B项正确。

　　6．Which of the following may be the reason for Walker not taking a test of the disease?

　　A．She didn't want to affect her later life.

　　B．She was afraid of being cut 20 to 30 years.

　　C．She didn't want to get divorced with her husband.

　　D．She can't afford the money to take the test.

解析：选A　细节理解题。第三段重点讲述了对这种病进行测试对人今后的生活造成的影响，故A项正确。