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  3. When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of

When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of

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问题     When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of affliction and find ways to combat. Vaccination is one of the effective ways to protect the (1)_____ population of a region or country which may be (2)_____ grave risk. The process of vaccination allows the patient’s body to (3)_____ immunity to the virus or disease so that, if it is encountered, one can fight it (4)_____ naturally. To accomplish this, a small weak or dead (5)_____ of the disease is actually injected into the patient in a controlled environment, (6)_____ his body’s immune system can learn to fight the invader (7)_____. Information (8)_____ how to penetrate the disease’s defenses is (9)_____ to all elements of the patient’s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that (10)_____ the patient later come into contact with the real problem, his body is well equipped and trained to (11)_____ with it, having already done so before.
    There are, however, dangers (12)_____ in the process. (13)_____, even the weakened version of the disease contained in the vaccine proves (14)_____ much for the body to handle, resulting in the immune system (15)_____, and, therefore, the patient’s death. Such is the case of the smallpox vaccine, (16)_____ to eradicate the smallpox epidemic that nearly (17)_____ the whole Native American population and killed massive numbers of settlers. (18)_____ l in 10,000 people who receive the vaccine (19)_____ the smallpox disease from the vaccine itself and dies from it. Consequently, the process, which is truly a (20)_____, may indeed hide some hidden curses.
Notes:
proportions (pl.)规模；程度；大小
affliction (疾病)痛苦
vaccination n. 接种疫苗
eradicate v. 根除,消灭
选项 A、entire
B、total
C、complete
D、complex
答案A
解析 词义搭配。entire与whole在许多情况下可以通用。例如：The people’s government has the support of the entire(＝whole)population．(人民政府得到全民的支持)。但是，entire可以修饰抽象名词，whole有时就不能。例如：I am in entire ignorance of what he did．(我全然不知他做了些什么)。total与entire不同，total有较强的数量计算意味。例如：The total sum of the expenditure is twelve dollars and fifty-seven cents．(开支总数是12美元57美分)。complete完全的，不缺乏什么的。例如；Now that the missing volume has been found，the series is complete．(丢的那卷找到了，因此这部书又完整了)。complex联合的，复合的。例如：a complex system/network。
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