1、课时作业20Wheat is a main source of food for people across the planet, accounting for a fifth of the calories consumed globally.But as a result of climate change, scientists believe most parts of the world where the crop is grown will be hit by water shortages by the end of the century.And the US could
2、be among the countries worst affected, the authors of the research published in the journal Science Advances told Newsweek.If climate change isnt dealt with, by the year 2100,60 percent of areas that grow wheat will be hit by water scarcityup from the current level of 15 percent, according to the in
3、ternational team of scientists.Coauthors Miroslav Trnka and Song Feng told Newsweek that in their previous research, they had shown climate change may cause soil to become less moist(湿润的) across most mainland US states, including those where wheat is grown.As a result, the US could be “one of the to
4、p most affected wheat producers” in terms of the increase in areas affected by severe droughts，they said in a joint statement.Worryingly, existing research has predicted a 4.0 to 6.5 percent drop in global wheat production per 1 degree Celsius of warming if climate change isnt eased.And its unlikely
5、 that wheat can be replaced if water becomes scarce, as its not as thirsty as other crops and can do without water for a relatively long period of time.“If multiple regions are affected by drought at the same time，it might be difficult to meet the demand even if the trade routes stay open and are no
6、t restricted by governmental measures，” warned Feng and Trnka.However，he said，“Studies show that if we continuously improve the sustainability and technologies in the coming decades and allow for international trade, we may overcome the negative impacts of climate change.”文章大意：科学家认为由于气候变化，到本世纪末，世界上大
7、部分种植小麦的地区将受到缺水的影响，如果气候变化不得到缓解，全球小麦的产量将会减少。1How will climate change hurt wheat production?ABy lowering the temperature.BBy reducing the water supply.CBy polluting the soil.DBy flooding the field.答案：B解析：考查细节理解。根据第一段第二句可知，由于气候变化，小麦种植地将受到缺水的影响，又根据第四段可知，缺水会影响小麦产量，故选B。2What can we learn from Paragraph 3?A
8、Wheat production caused droughts in most mainland US states.BThe United States is the biggest wheat producer in the world.CThe United States will suffer a lot from climate change.DClimate change is closely watched by American scientists.答案：C解析：考查推理判断。根据第三段的内容，尤其是“the US could be one of the top most
9、affected wheat producers”可推知，美国将在气候变化中受到很大影响，故选C。3Why is wheat unlikely to be replaced by other crops in a drought?AIt is the primary food for most countries.BIt is not influenced by global warming.CIt is widely grown in most countries.DIt needs less water than other crops.答案：D解析：考查细节理解。根据第四段最后一句可知，
10、小麦不像其他作物那样那么需要水，在相当长的一段时间内没有水也能生存，因此小麦不太可能被其他作物取代，故选D。4In which section of a newspaper may this text appear?AHealth. BScience.CEducation. DEntertainment.答案：B解析：考查推理判断。通读全文可知，这是一篇有关气候变化对小麦产量的影响的文章，由此可推知，本文可能出现在报纸的科学版块，故选B。Universities now cater to students diets with customizable(可定制的 )menus.Todays c
11、ollege dining halls are like fastcasual chain restaurants with a focus on healthy, proteinand vegetablecentric dishes._1_The college food business is booming, now assessed at $18 billion, according to Technomic.Thats up from $12.4 billion a decade ago and close to $ 1.89 billion in 1972, when the Ch
12、icagobased food industry research firm started tracking it._2_Colleges now use everything to appeal to students. Highschoolers can turn to a variety of online sources(信息来源) to scan college food ratings as they make their application choices._3_ It can make it or break it if theyre lining up two scho
13、ols, with all other things being equal.For some students, its a concern about allergies, such as nuts, dairy products or soy.Others are committed to eating only local foods._4_ One of three Americans follows a specific diet, according to the International Food Information Council.The organization fo
14、und the number is even higher among those ages 18 to 34._5_ There are an increasing number of national restaurant chains opening on or near campuses. Food delivery platforms, including Uber Eats and DoorDash, bring fare from local eateries to the dorm rooms.School cafeterias must please students who
15、 grew up with high expectations from having watched the Food Network and following food trends online.“We have to be as competitive as fast food and even fine dining，” said Lisa Feldman, director of recipe management in a university.AFood trends catch on fast at colleges.BFood is part of decision fo
16、r a lot of people.CCollege dining halls want to deliver for students.DEveryone wants to be sure their diets are addressed.EIn 2019, the industry is expected to approach $18.7 billion.FCollege food operations need to gradually sharpen their food game.GMenus for a variety of diets are the new normal a
17、t college dining halls.文章大意：本文是一篇说明文。当前，各大高校为吸引学生，用可定制的菜单去迎合学生的饮食需求。1G解析：考查细节理解。根据空前的“customizable(可定制的) menus”“college dining halls”可知，G项中的“Menus for a variety of diets”“college dining halls”与上文对应，故G项符合语境。2E解析：考查细节理解。根据空前的“now assessed at $18 billion”可知，E项承接上文，说明在2019年大学食品行业的估价将接近187亿美元。3B解析：考查承上启下
18、。根据空前的“scan college food ratings as they make their application choices”和空后的“It can make it or break it if theyre lining up two schools, with all other things being equal”可知，B项“对很多人来说，食物是决定的一部分”符合语境，起到承上启下的作用。4D解析：考查细节理解。根据空前的“For some students.Others are committed to eating only local foods.”可知，D项“
19、每一个人都想确保自己的饮食需求被满足”符合语境。5F解析：考查段落主旨。根据空后的内容可知，本段主要讲述大学食堂应该与时俱进，提高自身竞争力，迎合学生的高期望。故F项最能概括本段内容。A couple in Ohio accidentally dropped off a bag containing almost $100,000 at an Ohio charity shop.Thanks to _1_ employees，they got the money back.The employees were going through _2_ last week when they came
20、 across a _3_.Inside was $97,004.“It was so much cash，”employee Kelsey Croy said.“I looked in the bag and we _4_ it right there on the desk.And it was $97,004.”Thankfully，the owners _5_ a receipt for tax purposes when they dropped off _6_ that morning.The employees _7_ called the couple but there wa
21、s no _8_.Not wanting to _9_ that amount of cash in the store，they called in the Zanesville Police Department._10_ repeated calls，officers finally got a hold of the couple.The couple hadnt realized the money was _11_. They told police they withdrew all their money to another bank.On the way，they _12_
22、 at the charity shop to donate a bag of clothes.Thats _13_ the money ended up there.“When we finally _14_ them，they just asked if they could get it sometime tomorrow.”the officer said.The couple has since made contact with the original _15_ who found the money to thank them.“Im just glad that I meet
23、 with a bunch of honest and loyal people，”Croy said.文章大意：本文属于说明文阅读，作者通过这篇文章主要向我们描述了一对夫妇在雇员们的帮助下找到了丢失的钱。1A.honestBgenerous C.brave D.clever答案：A解析：考查形容词辨析。honest诚实的；generous大方的；brave 勇敢的；clever 聪明的。多亏了诚实的员工，他们拿回了钱。故选A。2A.goods Bdonations C.food D.money答案：B解析：考查名词辨析。goods货物；donations捐赠物；food食物；money金钱。
24、员工们上周正在检查捐赠物资，这时他们发现了一个袋子。里面是97 004美元。故选B。3A.suitcase Bbox C.bag D.wallet答案：C解析：考查名词辨析。suitcase手提箱；box盒子；bag 袋子；wallet 钱包。员工们上周正在检查捐赠物资，这时他们发现了一个袋子。里面是97 004美元。故选C。4A.put Bcounted C.hid D.cleared答案：B解析：考查动词辨析。put 投入；counted计数；hid隐藏；cleared清除。我往袋里看了看，并且在桌子上仔细地数了数。故选B。5A.asked for Basked about C.gave
25、up D.gave out答案：A解析：考查短语动词辨析。asked for要求；asked about问及；gave up放弃；gave out发出。6A.cards Bfruits C.bills D.clothes答案：D解析：考查名词辨析。cards卡片；fruits水果；bills票据；clothes衣服。谢天谢地，那天早上放下衣服时，捐赠衣物的主人因为税务的原因要了一张收据。故选D。7A.surprisingly Bhesitatingly C.eventually D.immediately答案：D解析：考查副词辨析。surprisingly出人意料地；hesitatingly犹
26、豫地； eventually最终；immediately立即。雇员们立即打电话给这对夫妇，但没有得到答复。故选D。8A.concern Binformation C.reply D.letter答案：C解析：考查名词辨析。concern关注；information信息；reply答复；letter信件。雇员们立即打电话给这对夫妇，但没有得到答复。故选C。9A.deposit Bleave Cwaste D.spend答案：B解析：考查动词辨析。deposit存款；leave 留下；waste浪费；spend 花费。不想把那笔钱留在店里，他们打电话到Zanesville警察局。故选B。10A.A
27、fter BDuring C.Before D.In答案：A解析：考查介词辨析。经过多次通话，警官终于找到了这对夫妇。故选A。11A.found Bmissing C.stolen D.forgotten答案：B解析：考查动词辨析。found找到；missing失踪；stolen被偷；forgotten遗忘。这对夫妇还没有意识到钱不见了。故选B。12A.stopped Bsighed C.quarreled D.wandered答案：A解析：考查动词辨析。stopped停下；sighed叹息；quarreled争吵；wandered游荡。在路上，他们在慈善商店停下来捐赠一袋衣服。故选A。13A
28、.why Bwhen C.where D.how答案：D解析：考查关联词辨析。钱就是这样到那儿的。故选D。14A.inspected on Bgot rid of Cgot through D.dropped in on答案：C解析：考查短语动词辨析。inspected on观察；got rid of摆脱；got through接通电话；dropped in on顺道拜访。当我们终于打通他们电话时，他们只是问他们明天能不能拿到钱。故选C。15A.police BofficersC.customers D.employees答案：D解析：考查名词辨析。police 警察；officers 军官；
29、customers顾客； employees雇员。此后，这对夫妇为了感谢帮他们找到钱的员工们与他们取得了联系。故选D。阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。There are several reasons why school uniforms are a good idea. First of all, uniforms help the school look smart. The students feel that they belong to a particular group. When every pupil in the school wears
30、the uniform, nobody _1_(have) to worry about fashion(时尚). Everybody wears _2_ same style of clothes. Uniforms can be useful in unexpected ways. A school in Ireland has introduced an interesting new uniform. On the edge of the jacket, there is a piece of cloth _3_ gives off light in the dark. When th
31、e children are walking or _4_(cycle) to school on dark mornings, car drives can _5_(easy) see them.But can uniforms help improve school standards? The answer _6_ this question is not clear. One study in America found that students grades _7_(improve) a little after the school introduced uniforms. Bu
32、t some students didnt want _8_(wear) the uniform. Other American studies showed no _9_(connect) between uniforms and school performance.School uniforms are _10_(tradition) in Britain, but some schools are starting to get rid of them. Some very good schools dont have a uniform policy. However, unifor
33、ms are still popular. Pupils at about 90 percent of British secondary schools wear uniforms.文章大意：本文是一篇说明文。文章介绍了校服受欢迎的原因。1has/will_have解析：考查时态和主谓一致。空格前面的从句用了一般现在时，主句谓语动词应该用一般现在时或者一般将来时。而句子主语nobody是第三人称单数，所以当句子为一般现在时态时，谓语动词用第三人称单数。2the解析：考查定冠词的用法。此处特指校服的款式相同，the same.相同的。3that/which解析：考查定语从句的引导词。空格后面的
34、内容用来修饰a piece of cloth，而且在从句中作主语，所以用that或which来引导。4cycling解析：考查现在进行时态。因为连词or前面用的是walking，所以空格处应与之并列，用cycle的ing形式。5easily解析：考查副词。此处修饰动词see，用easy的副词形式。6to解析：考查固定搭配中介词的使用。the answer to.的答案。7improved解析：考查时态。主句谓语动词是found，用了一般过去时，此处时态应该与之保持一致。8to_wear解析：考查动词不定式作宾语。want to do sth.想要做某事。9connection/connecti
35、ons解析：考查名词。no用来修饰名词，此处用单复数形式均可。10traditional解析：考查形容词。此处形容词作表语，用来说明主语school uniforms的特点。假定你是李华，最近你正在考虑大学专业的选择问题。请给学校外教Tom写信征求意见，内容包括：1介绍自身情况；2说明未来设想；3期待专业推荐。注意：1词数80左右；2可以适当增加细节，以使行文连贯。Dear_Tom，Im_writing_to_ask_you_for_some_advice_about_what_Ill_major_in_at_college._As_an_outgoing_boy,_I_get_along_w
36、ell_with_people.And_I_have_a_great_passion_for_everything_I_love.Given_my_talents_in_art_and_language,_coupled_with_my_willingness_to_seek_new_experiences,_Ive_been_planning_to_learn_something_related_to_the_media.To_avoid_choosing_majors_blindly,_Id_appreciate_it_if_you_could_recommend_some_to_me.Yours，Li_Hua