2020-2021学年人教版英语选修7课后作业：UNIT 1GRAMMAR .doc

1、.七选五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、_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 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 agai

3、nst 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

4、 a womans body cells have a tendency(倾向) to age more slowly than a mans.Others think that a mans body cells have a tendency to age more quickly._5_AHowever, women, on average, live longer.BThe biological factor plays an important part.CWomen are also helped by their female genes.DThe female hormones

5、 also protect the body in another way.ERecent research seems to support both of these possibilities.FTherefore, women are more healthy than men and can live a better life.GHormones are chemicals which are produced by the body to control various body functions.本文主要讲述了女性比男性寿命长的原因。1A解析：根据空格下一句：一般说，女性比男

6、性多活6到7年。可知此处的意思是：然而，女性平均寿命比男性更长。故选A。2G解析：根据空格上句：男性和女性之间荷尔蒙的不同帮助女性寿命更长。可知此空的意思是：荷尔蒙是身体生产的控制各种身体功能的化学物质。故选G。3D解析：根据下句：它们帮助身体本身抵抗各种感染。可知此空的意思是：女性荷尔蒙也用另一种方式保护身体。故选D。4C解析：根据下句：科学家仍然没有确切地表明基因怎样影响年龄，但是他们认为基因确实在影响年龄。可知上句：女性基因也在帮助女性。5E解析：根据空格前两句：一些人认为女性身体细胞有一个比男性老化慢的倾向，另一些人认为男性身体细胞有一个老化快的倾向。可知E项“最近的研究似乎支持这两种

7、可能”符合题意。故选E。.翻译下列句子，注意黑体部分要用到本单元的单词、短语或句型，然后将其合并成一篇短文1李磊在一次事故中受伤致残。Li Lei got injured and disabled in an accident.2他的行为变得有点儿滑稽。His conduct became a bit funny.3有些同学每次见到他都取笑他。Every time some of his fellow students saw him, they would make fun of him.4对此他感到很烦恼。He was quite annoyed at this.5起初，他在诸多方面难以适

8、应自己的残疾。At first, he had trouble in adapting himself to his disability in many ways.6换句话说，他很多事都不能做了，如打篮球和踢足球。In other words, he had no access to many things, such as playing basketball and football.7医生建议他除了要有足够的休息外，还要经常锻炼。The doctor suggested that he do regular exercise as well as having adequate res

9、t.8这种特殊的训练对他的康复很有好处。The special training was greatly beneficial to his recovery.9几个月之后，他康复了，并能像以前一样过丰富充实的生活。Several months later, he recovered and could live as rich and full a life as before.请将以上句子连成一篇语言流畅、用词准确、逻辑严密的短文。Li_Lei_got_injured_and_disabled_in_an_accident,_making_his_conduct_a_bit_funny.E

10、very_time_some_of_his_fellow_students_saw_him,_they_would_make_fun_of_him,_at_which_he_was_quite_annoyed.At_first,_he_had_trouble_in_adapting_himself_to_his_disability_in_many_ways;_in_other_words,_he_had_no_access_to_many_things,_such_as_playing_basketball_and_football.The_doctor_suggested_that_he_do_regular_exercise_as_well_as_having_adequate_rest.The_special_training_was_greatly_beneficial_to_his_recovery.Several_months_later,_he_recovered_and_could_live_as_rich_and_full_a_life_as_before.