Unit 2 Working the land using language课时作业

Ⅰ.阅读填句

　　(2018·北京海淀区模拟)Both men and women are living longer these days in industrialized countries.__1__ 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.__2__ 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 the blood flow.In fact，women are less likely to have high blood pressure or to die from heart attacks.

　　__3__ They help the body defend itself against some kinds of infections.This means that women generally get sick less often and less seriously than men.The common cold is a good example：women，on average，get fewer colds than men.

　　__4__ Scientists are still not exactly sure how genes influence aging，but they believe that they do.Some think that a woman's body cells have a tendency(倾向)to age more slowly than a man's.Others think that a man's body cells have a tendency to age more quickly.__5__

　　A．However，women，on average，live longer.

　　B．The biological factor plays an important part.

　　C．Women are also helped by their female genes.

　　D．The female hormones also protect the body in another way.

　　E．Recent research seems to support both of these possibilities.

　　F．Therefore，women are more healthy than men and can live a better life.

　　G．Hormones are chemicals which are produced by the body to control various body functions.

　　[语篇解读]　这是一篇说明文。文中分析了女性比男性长寿的原因。

　　1．解析：选A　根据空格后的"In general，they can expect to live six or seven years more than men"可知，空格处讲的是平均来看，女人的寿命更长。同时，空格处所表达的内容与文章第一句构成转折关系。所以A项正确。

　　2．解析：选G　此处为过渡句，解释什么是荷尔蒙并谈及它的作用。所以G项正确。

　　3．解析：选D　由空格后的"They help the body defend itself against some kinds of infections"可知，该段讲的是荷尔蒙的其他功能。所以D项正确。

4．解析：选C　由空格后的"Scientists are still not exactly sure how genes influence