【创新设计】（广东专用）高中英语 Unit 15 Learning Period Four Lesson 4Understanding课时精练 北师大版必修5(1).doc

unit 15 learning period fourlesson 4understanding 课时精练（北师大版必修5，广东专用）(时间：35分钟).完形填空(共15小题；每小题2分，满分30分)阅读下面短文，掌握其大意，然后从115各题所给的a、b、c和d项中，选出最佳选项。among all the fast growing science and technology，the research of human genes，or biological engineering as people call it，is drawing more and more attention now.sometimes it is a hot_1_discussed by people.the greatest thing that gene technology can do is to cure_2_diseases that doctors at present can almost do nothing with，such as cancer and heart disease.every year，millions of people are murdered by these two_3_.and to date，doctors have not found an_4_way to cure them.but if the gene technology is_5_，not only these two diseases can be cured_6_，bringing happiness and more living days to the patients，but also the great amount of money people_7_on curing their diseases can be saved，so it benefits the_8_as well._9_，human life span can be prolonged.gene technology can help people to give birth to more_10_and clever children.some families，with the english imperial family being a good example，have hereditary(遗传的)diseases.this_11_their children will for sure have the family diseases，_12_is a great trouble for these families.in the past，doctors could do_13_about hereditary diseases，but gene technology can solve this problem_14_.the scientists just need to find the_15_gene and correct it，and a healthy child will be born.【解题导语】 在所有的快速发展的科学技术中，人类基因的研究得到了越来越多的关注。如果这项技术能够应用到医学中的话，那么它的意义将不同寻常1a.articlebtopiccdisease dquestion答案b人类基因研究是人们讨论的热门话题(topic)。其他几项不合语意。2a.ordinary bcommoncdifficult dserious答案d根据该空后面的doctors at present can almost do nothing with，such as cancer and heart disease可知，serious符合语境。利用基因技术可以治愈一些医生没有办法治的严重的(serious)疾病。3a.killers bpeoplecgenes dengineers答案a癌症和心脏病是两大杀手(killers)，每年“杀死”数百万人。其他几项不合语意。4a.impossible beffectivecaccessible dactual答案b迄今为止，医生还没有找到有效的治疗癌症和心脏病的方法。effective“有效的”，符合语境。impossible“不可能的”；accessible“可得到的，可进入的”；actual“真实的，实际的”。5a.found bdiscoveredcapplied dprovided答案c如果基因技术得到应用的话，不但可以完全治愈这两种病，带给病人幸福和更长的生命，而且还可以节省为治病花费的很多钱。apply“应用”。6a.completely babsolutelyccorrectly daccidentally答案a此处讲的是基因技术能完全(completely)治愈这两种疾病。7a.got bspentcinsisted dput答案bspend.on doing sth.意思是“花费做某事”。此处表示花在治病上的钱。get on“进展”；insist on“坚持要求”；put on“穿上”。8a.health beducationcsociety deconomy答案d根据前面一句话可知，利用基因技术治病，可以省下很多钱，也对经济有利，因此这里选economy。9a.besides bhoweverctherefore dthen答案a根据上文内容可知，此处是继续讲运用基因技术治病的好处，故用besides，表示“除此之外”。句意：除此之处，还可以延长人的寿命。10a.healthy bpessimisticchandsome doptimistic答案a根据下文讲述的都是健康问题可知，选healthy。句意：基因技术可以帮助人们生下更加健康、聪明的孩子。healthy“健康的”；pessimistic“悲观的”；handsome“英俊的”；optimistic“乐观的”。11a.indicates bshowscsuggests dmeans答案d语意：这意味着(means)他们的孩子一定有家族病。indicate“象征，表明”；show“表明”；suggest“建议”；mean“意味着”。12a.which bitcthat dthis答案awhich引导非限制性定语从句，指代前面整个句子的内容。13a.everything banythingcsomething dnothing答案d由后面but后转折的内容可知，在过去，医生对遗传病束手无策。14a.immediately bluckilycconfidently dperfectly答案d但基因技术可以很好地解决这个问题。immediately“立刻地”；luckily“幸运地”；confidently“自信地”；perfectly“极好地”。15a.wrong brightcbad dgood答案a基因应该没有好坏之分，因此排除c、d两项。根据文章内容可知，科学家只要找到有错误的基因并纠正它，一个健康的孩子便诞生了。.语法填空(共10小题；每小题1.5分，满分15分)阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在标号为1625的相应位置上。this happened in a thirdgrade classroom.jim sat_16_his desk and all of a sudden，there was a puddle(一滩水)between his feet and the front of his trousers was wet.he felt his heart was going to stop.he knew_17_would happen when his classmates found out.he looked up and there came the teacher with_18_look in her eyes that said he_19_(discover)as the teacher was walking towards_20_，a classmate named susie was carrying a goldfish bowl full of water to her desk.suddenly，susie tripped(绊倒)and，_21_(strange)，dumped the whole bowl of water in jims lap.he pretended to be angry，but all the while he was saying deep in his heart，“thank you！”jim became the object of sympathy instead of ridicule.the teacher brought him gym shorts to put on.all the others crawled on their hands and knees，_22_(clean)up around his desk.but_23_life would have it，the ridicule that should have been his had been transferred(转移)to susie.she tried to help，_24_they told her to leave the room._25_school was over，jim walked over to susie and whispered，“you did that on purpose，didnt you？”susie whispered back，“i wet my trousers once，too！”答案16.at/beside17.what18.a19.had been discovered20him21.strangely22.cleaning23.as24.but25.when.阅读理解(共5小题；每小题2分，满分10分)have you ever dreamed about a trip to space? seeds of some vegetables and crops are a lot luckier than you, as they have travelled to space and back.china is among the three countries in the world that carry out agricultural research in space. the others are russia and the us. since 1987, china has sent about 1,000 species of seeds into space，carrots, lettuces (生菜)and wheat. even on chinas first manned spacecraft shenzhou v, there were some seeds from taiwan.“conditions in outer space such as radiation and low gravity can cause big changes in the seeds，”said chinese researcher jin xing.but not all seeds are better after going to space. after returning to the earth, the best seeds are selected. these seeds produce much more and also grow faster than normal seeds. as the safety of genetically modified food is still being debated, some people doubt the safety of these “space vegetables” because some of their genes are changed during the trip to space.but jin holds a more positive view. he said，“unlike genetically modified crops, no new genes are introduced to the space vegetables, so they are definitely safe.” china has also been cooperating with nasa to grow some super size potatoes on the international space station. special growth rooms use computers to control the light, temperature and humidity. using this technology a new, virusfree potato can be produced every 40 to 50 days instead of the previous yearly crop.26which of the following countries hasnt carried out agricultural research in space according to the passage?achina. bjapan.crussia. dthe us.答案b根据第二段“china is among the three countries.the others are russia and the us.”可知日本不在进行太空农业研究的国家之列。27once seeds of some vegetables and crops are sent into space and back ，_.anot all of them produce bigger cropsbthey are all better than before going to spacecno change caused in the seeds because of radiation and low gravitydthey produce much more and grow faster than normal seeds答案a根据第四段“but not all seeds are better after going to space.”可知并不是所有返回地球的种子都比去太空之前要好。要注意句子中的部分否定。28jin has no doubt about the safety of the space vegetables because _.athe seeds sent to space are all the same as those of genetically modified foodbthe seeds sent to space are the bestcno new genes are put in them unlike genetically modified fooddthe space