下面的短文后有2 項測試任務：（1） 第23-26 題要求從所給的6 個選項中為第1-4 段
    每段選擇1個標題；（2） 第27 -30 題要求從所給的6 個選項中為每個句子確定1個選項。
    Multiple Sclerosis（多發(fā)性硬化癥）
    1 Multiple Sclerosis （MS） is a disease in which the patient's immune（免疫的）system attacks the central nervous system. This can lead to numerous physical and mental symptoms, as the disease affects the transmission of electrical signals between the body and the brain. However, the human body, being a flexible, adaptable system, can compensate for some level of damage, so a person with MS can look and feel fine even though the disease is present.
    2 MS patients can have one of two main varieties of the disease： the relapsing form （復發(fā)型）and the primary progressive form. In the relapsing form, the disease progresses in a series of jumps； at times it is in remission（減輕）。which means that a person's normal functions return for a period of time before the system goes into relapse and the disease again becomes more active. This is the most common form of MS； 80-90% of people have this form of the disease when they are first diagnosed. The relapse-remission cycle can continue for many years. Eventually, however, Ioss of physical and cognitive functions starts to take place and the remissions become less frequent.
    3 In the primary progressive form of MS, there are no remissions and a continual but steady loss of physical and cognitive functions takes place. This condition affects about 10-15% of sufferers at diagnosis.
    4 The expected course of the disease, or prognosis（預后）,depends on many variables： the subtype of the disease, the patient's individual characteristics and the initial symptoms. Life expectancy of patients, however, is often nearly the same as that of an unaffected person - provided that a reasonable standard of care is received. In some cases a near-normal life span is possible.
    5 The cause of the disease is unclear； it seems that some people have a genetic Susceptibility（易感性）,which is triggered by some unknown environmental factor. Onset（發(fā)作）of the disease usually occurs in young adults between the ages of 20 and 40.It is more common in women than men； however, it has also been diagnosed in young children and in elderly people.
    23. Paragraph 1______
    24. Paragraph 2 ______
    25. Paragraph 3______
    26. Paragraph 4______
    A. The relapsing form of MS
    B. The cause of MS
    C. The primary progressive form of MS
    D. The definition of MS
    E. The development of MS
    F. The treatment for MS
    27. MS affects the communication of nerve cells between the body and ______
    28. An MS patient can feel fine for years without being affected much by ______
    29. 10-15% of MS patients are diagnosed as having ______
    30. Young adults might have a higher chance of developing the disease than ______
    A. the elderly people
    B. relatives of MS patients
    C. the progressive form
    D. the brain
    E. life expectancy
    F. the disease
    答案與解析：
    23 D 第一段第一句就解釋了MS是什么疾病,接著又介紹了它對人體的影響,故答案應該是D.
    24 A 第二段第一句說,MS有兩種類型：復發(fā)型和原發(fā)性漸進型,然后就詳細具體介紹了復發(fā)型是什么情況。
    25 C 第三段簡單介紹了原發(fā)性漸進型是什么樣的情況。
    26 E 第四段談了MS的預后,特別是病人的預期壽命情況。
    27 D 本題答案存在于第一段第二句中,其中就說到“本病影響到身體和大腦之間的電信奇的傳遞”。
    28 F 第二段第二句就說到“復發(fā)型病人在疾病復發(fā)變嚴重之前可以有一段時期身體功能恢復正常”。
    29 C 第三段講的就是原發(fā)性漸進型的MS,最后一句明確回答了本題。
    30 A 第五段第二句說,“本病通常都發(fā)生于20-40歲的成年人”, 故老年人自然較少。