根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Both men and women are living longer these days in industrialized countries. _ In general, they can expect to live six or seven years more than men. One reason for this is biological.
One important biological factor that helps women live longer is the difference in hormones between men and women. _ Between the ages of about 12 and 50, women produce hormones that are involved in fertility(生育能力). These hormones also have a positive effect on the heart and blood flow. In fact, women are less likely to have high blood pressure or to die from heart attacks.
_ They help the body defend itself against some kinds of infections. This means that women generally ger sick less often and less seriously than men. The common cold is a good example: women, on average, get fewer colds than men. _ Scientists are still not exactly sure how influence aging, but they believe that they do. Some think that a woman’s body cells have a tendency(向) to age more slowly than a man’s. Others think that a man’s body cells have a tendency to age more quickly. _
16.
17.
18.
19.
20.
A
根据上面的解题思路可知，在工业国家，人们通常会活得长一点，但女人比男人获得更长。故选项A正确。
根据后一句In general, they can expect to live six or seven years more than men可。知女人比男人活的更长。
industrialized countries 工业国家；对词义的把握。
G
根据上面的解题思路可知，由于荷尔蒙的功能不同导致女性可以比男性活得更长久些，故选G。
根据前一句One important biological factor that helps women live longer is the difference in hormones between men and women和后一句Between the ages of about 12 and 50, women produce hormones that are involved in fertility 可知，中间这一句肯定是和hormone有关。
biological 生物的；对词义的把握。
D
根据上面的解题思路可知，荷尔蒙还能帮身体抵御一定的疾病，故选D。
根据后一句They help the body defend itself against some kinds of infections他们可以帮助身体预防一些疾病，联系上文可知they指代的是荷尔蒙，要给本段找一个总起的句子。
defend防护；对词义的把握。
C
根据上面的解题思路可知，男女细胞不同与衰老速度有关，而细胞又是遗传的，故选C。
根据倒数第一句和第二句Some think that a woman’s body cells have a tendency to age more slowly than a man’s. Others think that a man’s body cells have a tendency to age more quickly.可知女人比男人衰老得慢还和其本身的身体细胞有关。
cell细胞；对词义的把握。
E
根据上面的解题思路可知，最近的调查结果支持了女性的细胞与男性的细胞的不同从而减缓了其衰老观点，故选E。
根据文章倒数第三句but they believe that they do科学家们现在知道了妇女的基因对延缓了妇女的衰老程度归功于最近的调查。
seem好像；对词义的把握。