[C] prove that cancer will be cured in fifty to sixty years

　　[D] warn that there is still a long way to go before cancer can be conquered

　　64. The author implies that by the year 2000,__.

　　[A] there will be a drastic rise in the five-year survival rate of skin-cancer patients

　　[B] 90 percent of the skin-cancer patients today will still be living

　　[C] the survival statistics will be fairly even among patients with various cancers

　　[D] there won’ t be a drastic increase of survival rate of all cancer patients

　　65. Oncogenes are cancer-causing genes__.

　　[A] that are always in operation in a healthy person

　　[B] which remain unharmful so long as they are not activated

　　[C] that can be driven out of normal cells

　　[D] which normal cells can’ t turn off

　　66. The word "dormant" in the third paragraph most probably means__.

　　[A] dead

　　[B] ever-present

　　[C] inactive

　　[D] potential

　　[第63题答案及题解页数] D 第页

　　[第64题答案及题解页数] D 第页

　　[第65题答案及题解页数] B 第页

　　[第66题答案及题解页数] C 第页

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