1、单元加餐练.完形填空All our food comes directly or indirectly from soil. The soil which is dark in colour is humus (腐质土). Humus includes plenty of useful materials _1_ from dead plants and waste _2_ from animals. Soil _3_ its food. If we do not _4_ it with any, _5_ will not grow well on it. Animal _6_ is the
2、best food for soil, and chemical _7_ are good, too. A change of crop every year in the same soil will also do _8_.When soil is too _9_， winds blow it away, and the land will soon look like a _10_. Farmers can prevent this _11_ growing trees. This will weaken the _12_ of the wind. After a heavy rain,
3、 the _13_ carries the humus down to the river. This often happens _14_ the fields are on the hillsides. Farmers can level their fields and make them _15_.At the beginning of the _16_ there have been about 7,000 _17_ people on earth. We now ought to _18_ every bit of the soil. _19_， where will such a
4、 large _20_ grow their food?本文是一篇说明文。怎样才能让我们赖以生存的土壤更好地为我们服务呢？又怎样才能减少土壤的流失呢？本文将给出答案。1A.died Bmade Cbrought Dtaken答案：D解析：taken from.是过去分词短语作定语，修饰useful materials。2A.matter Bgases Cgoods Drubbish答案：A解析：waste matter废弃物，这里指“(动物的)粪便”。3A.eats Bneeds Cfeeds Denjoys答案：B解析：土壤“需要”食物，指上文中的dead plants和waste matt
5、er from animals。4A.give Bproduce Csupply Ddevelop答案：C解析：supply.with.“把提供给”。5A.man Btrees Cplants Danimals答案：C解析：直接依靠土壤生存的只有植物，而B项太片面。6A.body Bblood Cbone Dwaste答案：D解析：animal waste“动物粪便”，即上文提到的waste matter。7A.poisons BfertilizersCpowders Dmedicines答案：B解析：改良土壤的应该是“化肥(chemical fertilizer)”。poison“毒药，毒物
6、”；powder“粉末”；medicine“药”。只有B项符合语境。8A.harm Bgood Chelp Dfavour答案：B解析：do good“有益处，有好处”。9A.light Benergetic Cdry Dthirsty答案：C解析：当土壤太“干燥(dry)”时，风就会把土壤吹走。10A.desert Blake Cvalley Dplain答案：A解析：因为风把土壤吹走了，所以土地看上去就像“沙漠”。11A.from Bby Coff Dwith答案：B解析：by表示通过某种方式或手段，后接动词ing形式作宾语。12A.noise Bblow Cspeed Dforce答案：
7、D解析：通过植树可以减弱风的“力量(force)”，从而防止土壤被风吹走。noise“噪音”；blow“吹”；speed“速度”。13A.wind Bfarmer Ctree Dwater答案：D解析：大雨过后，“雨水”会把土壤里的腐质土冲到河里。14A.where Bin Cto Dthat答案：A解析：分析句子可知此处为定语从句，从句中缺少地点状语，where表示地点。15A.hilllike BstairlikeCbottomlike Dgulflike答案：B解析：农民可以平整田地，使它们像梯级一样。stairlike“像梯级的”。16A.period Bcentury Chistor
8、y Ddynasty答案：B解析：at the beginning of the century“在本世纪初”，符合语境。17A.thousand BthousandsCmillion Dmillions答案：C解析：thousand, million等与具体数字连用时，不加s，故排除B、D两项，根据常识可知选C。18A.affect Buse Csave Dshare答案：C解析：我们现在应该“节约(save)”每一寸土地。19A.Otherwise BHoweverCTherefore DThough答案：A解析：otherwise“否则”，符合句意。20A.people Bglobe C
9、population Dnumber答案：C解析：用large修饰population，指人口多。.阅读理解Ive always felt a need to be prepared for whatever the situation Ive found myself in.My mother once took me to a store when I was seven years old. She and I got to the checkout counter, and she realized she had forgotten a couple of things on her
10、 shopping list. She left me with the cart and ran off to get what she needed. “Ill be right back，” she said. She was gone just a few minutes, but in that time, I had loaded all the things on the belt and everything was rung up. I was left staring at the cashier, who was staring at me. “Do you have m
11、oney for me, son？” she said. “Ill need to be paid.” I didnt realize she was just trying to amuse herself. So I stood there, ashamed and embarrassed. By the time my mom returned, I was angry. “You left me here with no money! This lady asked me for the money, and I had nothing to give her！”Now that Im
12、 an adult, youll never catch me with less than $200 in my wallet. I want to be prepared in case I need it. Ive always admired people who are wellprepared. In college, I had a classmate named Norman. One day he was giving a presentation on an overhead projector (投影仪) and in the middle of his talk, th
13、e light bulb on the projector blew out. We would have to wait ten minutes until someone found a new projector. “Its OK，” he announced. “Theres nothing to worry about.” We watched him walk over to his bag and pull something out. He had brought along a spare bulb for the overhead projector. Who could
14、even think of that?I often told my students, “When you go into the wilderness, the only thing you can depend on is what you take with you.” And essentially, the wilderness is anywhere but your home or office. So take money. Pack a light bulb. Be prepared.这是一篇夹叙夹议文，作者用自己童年时和大学时的经历说明了一个道理：打有备之战，方能取胜。1
15、Why did the cashier ask the author to pay for the purchases?ABecause he was shopping by himself.BBecause his mother asked her to do so.CBecause she was playing a joke on him.DBecause his mother was away for something else.答案：C解析：细节理解题。依据第二段中的“I didnt realize she was just trying to amuse herself”可知，这
16、位收银员在和作者开玩笑，故选C项。2Why was the author angry with his mother?AHis mother left him alone.BHe lost face in front of the cashier.CHis mother forgot to buy something.DHe had just quarreled with the cashier.答案：B解析：推理判断题。依据第二段中的“So I stood there, ashamed and embarrassed”可知，当作者意识到自己没有钱去结账的时候，他感到尴尬和难为情。由此可推知，
17、下文他对母亲生气是因为他感到很丢面子。故选B。3Why did Norman bring a spare bulb with him?AHe was always wellprepared.BHis presentation was about bulbs.CHe knew the classroom equipment was of poor quality.DHe predicted the bulb on the projector would blow out.答案：A解析：细节理解题。根据第三段中的“Ive always admired people who are wellprep
18、ared”可知，Norman是一个有准备的人。4What do the two stories in the passage tell us?AAccidents happen almost every day.BMoney is the key that opens all doors.CIn fair weather prepare for the foul.DChances favor those who are wellprepared.答案：C解析：推理判断题。文中的两个故事都讲述了应提前做好准备、未雨绸缪的道理，因此选C。“In fair weather prepare for t
19、he foul”意为“未雨绸缪”。.读后续写阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。We never know the difference we might make if we take the time to encourage someone. I gave up the idea of being a writer the summer before I started college. Id been writing since I was five years old. My little friends wanted
20、toys that year. I wanted paper. Childhood passed and a box of short stories gave way to my middle school days. I wrote for a magazine and by the time I was in eighth grade, half the annual publication was written by me.Sometimes Id dream with my parents about being a novelist, writing books that eve
21、ryone might read. My dad was always sure it would happen. He would read one of my poems or stories and his tears would well up. “Thats beautiful, honey，” hed tell me. “One day people from all over the world will know what a gift you have.” Those words encouraged me through high school to keep believ
22、ing that writing was my calling.But somewhere along the way, during the months of my senior year, I became disappointed. The crazy injustice in this worldbad guys getting back out on the street and doing harm again and againchanged my mind. “Im going to be a lawyer，” I told my parents.My dads face f
23、ell, but he kept his smile. “Whatever you do, youll be brilliant at it，” he said.One of my first classes at college was journalism. A few weeks into the term, the professor, Bob Scheibel, assigned us a story about an apartment fire. He gave us the facts and we had a few days to write a news story.I
24、remember turning in that first paper, sure that I had the facts right. I didnt expect much feedback(反馈). But a few days later, Bob Scheibel asked me to talk to him after class. Questions raced through my mind. What had I done wrong? Had I got the facts mixed up? Did I miss something critical in the
25、details? By the time the class was over, I found myself in front of the professor. His eyes met mine with great seriousness.答案Paragraph 1：“You will never ever stop writing，” he said. “You are a very, very good writer. Dont change your mind.” I left him that day a different person. My back felt a lit
26、tle straighter; my steps came a little quicker. I was a writer. Professor Bob Scheibel had told me so. The next day I did what he said.Paragraph 2：Two years ago, after my first bestseller, I found Bob Scheibel. I called him and he still remembered me. He congratulated me on my writing success, and I
27、 told him my memory of that special day and that I wouldnt have been a writer if he hadnt said those words. I knew Professor Scheibel was touched and after a long moment he thanked me. Thats the thing with little words. The words my parents said to me when I was growing up and the words Bob Scheibel said to me that day after his journalism class made a difference to me.