資源簡介 / 讓學習更有效 新課備課備考 | 英語學科/ 讓學習更有效 新課備課備考 | 英語學科2025年滬教版(2024)新八年級英語上冊精講精練Unit 2 Amazing numbers核心語法:數詞(分數和小數的表示)一、分數的表示方法基本結構分子(基數詞) + 分母(序數詞)分子 ≥ 2 時,分母用復數形式(加-s):1/3 → one-third2/5 → two-fifths3/4 → three-quarters(特殊形式)常見分數示例分數 英文表達 備注1/2 one half 不用 "one-second"1/4 one quarter 或 one-fourth3/4 three quarters 或 three-fourths1 1/2 one and a half 帶整數用"and"連接特殊規則分母為2/4時,常用half/quarter代替序數詞:1/2 → a half(非one-second)1/4 → a quarter(非one-fourth)分子為1時,分母用單數序數詞:1/6 → one-sixth(非one-sixths)二、小數的表示方法1、基本規則小數點讀作"point",小數點后數字逐位讀(不用分數形式):0.5 → zero point five3.14 → three point one four12.08 → twelve point zero eight2、注意事項整數部分為0時,可讀作"zero"或"nought"(英式):0.75 → zero point seven five小數后末尾的"0"可省略不讀:2.50 → two point five三、分數與小數的實際應用1、數學表達1/2 + 0.5 = 1 → One half plus zero point five equals one.3/4 ≈ 0.75 → Three quarters is approximately zero point seven five.2、生活中的用法時間:7:30 → seven thirty 或 half past seven長度:1.5米 → one point five meters 或 one and a half meters概率:75% → seventy-five percent(= 3/4)四、易錯點提醒1、分數單復數混淆錯誤:two-third(正確:two-thirds)錯誤:three-fifth(正確:three-fifths)2、小數與分數混用錯誤:one point two-thirds(正確:1.666... → one point six recurring)3、"a"與"one"的區別1/2 → a half(更口語化)1/2 → one half(更強調精確性)1.Read the information below. Which one is RIGHT according to the chart Nancy John DanielSubjects 6 8 12Clubs 3 2 4Free time each day 4 hours 3 hours 1 hourA.Nancy studies the most subjects of the three. B.John is in the most clubs.C.Daniel has more free time than Nancy. D.John has less free time than Nancy.2.In our school ________ of the students ________ boys.A.three fifths; are B.third fifth; are C.three fifth; is3.It’s said that ________ of the water around the world ________ polluted.A.two thirds; has B.two thirds; is C.two third; are D.two thirds; have4.It’s said that ________ of the water around the world ________ polluted.A.two third; is B.two thirds; is C.two thirds; are5.—________ of the students in our class have passed the exam.—Oh, that means 20% of them should work harder.A.One fifth B.Four five C.Four fifths D.One five6.________ of the students in Class 6 have lunch at school.A.Two fifth B.One thirds C.Three fifth D.Three quarters7.It's said that ________ of the water around the world ________ polluted.A.two third; has B.two thirds; have C.two thirds; is8.—What do you think of the environment here —Wonderful! __________ of the land __________ covered with trees.A.Two fifths; is B.Two fifth; is C.Two fifths; are D.Two fifth; are9.According to a survey, four out of five women do housework at home, but only ________ of men would do it.A.four fifth B.four fifthsC.two fifth D.two fifths10.The number of the cars in this village is about seven ________, and ________ of them are old cars.A.hundred; two thirds B.hundred; two third C.hundreds; two thirds D.hundreds; two third11.________ of the students in our class can work out this problem.A.Third fives B.Three five C.Three fifths D.Third fifth12.In our class ________ of the students are girls.A.three fifths B.three fifth C.third three D.third fifths13.______ of the land in this area ______ covered with forests.A.One third; is B.One thirds; is C.One third; are D.One thirds; are14.In our class ________ of the students ________ boys.A.three fifths; are B.three fifth; are C.three fifths; is D.three fifth; is15.About ________ of the students in my school ________ to school by bike.A.two fifth; go B.two fifths; go C.two fifth; goes D.two fifths; goes16.________ of his works were written in his ________.A.One-thirds; fifties B.One-third; fiftyC.Three quarters; fifties D.Three quarters, fiftieth17.________ of the land in the city is covered with trees and grass..A.Two five B.Two fifth C.Second five D.Two fifths18.There are fifty students in our class, ________ of us ________ table tennis.A.two third; likesB.two three; likeC.two thirds; like19.__________ of students are from China.A.Two third B.Two three C.Two thirds D.Second three20.—How are you getting along with your work —We have finished ________ of it.A.two five B.two fifths C.two fifth D.second fifths21.This is a big class, and ________ of the students are girls.A.two third B.second three C.two three D.three quarters22.About __________ of the earth is covered with water.A.three-quarter B.three quarters C.three-fourth D.third fourths23.Oceans cover about ________ of the earth’s surface.A.three fourth B.three quarter C.three quarters D.third four24.China has ________ population in the world and about ________of the people in the world live in China.A.lager, one fifth B.the largest, one fifthC.largest, one fifths D.large, one fifths25.About ________ of the people lived a difficult life in the ________.A.two third; 1960 B.two thirds; 1960s C.two third; 1960s26.Over ________ of students in this school took part in the survey.A.one-thirds B.two-thirds C.three quarter D.all27.There are ________ teachers in our school, and ________ of them are women teachers.A.two hundreds; three fourth B.two hundred; three fourthsC.two hundred; three forths D.two hundred of; three fourths28.About ________ of people don’t like watching the movie.A.two five B.two fifths C.second five D.second fifths29.________ of the city is covered with trees.A.Three quarter B.Three fourthC.Three quarters D.Three four30.Nowadays, ________ of the old people in the area ________ used to dancing at the square after supper.A.two thirds; is B.two third; is C.two thirds; are D.second thirds; are31.Oceans cover about ________ of the earth’s surface, so we call the earth the “Blue Planet”.A.one-third B.two-thirds C.one-fourth D.two-fifths32.—Can you read the number 36.36 correctly —Yes, I can read it as ________.A.thirty-six point three six B.three six point three sixC.thirty-six point thirty-six D.three six point thirty-six33.17.17 can be read ______.A.one seven point one seven B.seventeen point seventeenC.seventeen point one seven D.one seven point seventeen34.—Which is the smallest number of the four —______.A.Two thirds B.A half C.A quarter D.Three fourths35.From the study, we know that about ________ of the Earth is covered by forests.A.three-fifth B.three-fifths C.third-fifth D.thirds-fifths36.In 1850, about ________ of the land was covered by forest in the USA.A.third B.the third C.a third D.a thirds37.Here are more than one hundred teachers in our school. ________ of them are ________.A.Two fifth; man teachers B.Second fifths; men teacherC.Two fifths; men teachers D.Second fifths; man teacher38.About ________ of the students in Grade Nine this year were born in the ________.A.four fifths; 1990s B.four fifth; 1996C.fourth five; 1997 D.four fifth; 1990s39.About ________ of people enjoy the TV play. And 70 percent of the music in it ________ very original (原創的).A.three fifths; is B.three fifths; are C.three fifth; is D.three fifth; are40.According to the survey last week, about ________ of students took part in outdoor activities to release their study pressure.A.three fourth B.three fourths C.third fourths D.third four41.—________ of the students in our class ________ passed the exam.—Oh, that means 20% of them should work harder.A.One fifth; have B.Four five; has C.Four fifths; have42.According to a survey, four out of five women do housework at home, but only ________ of men will do it.A.four-fifth B.four-fifths C.two-fifth D.two-fifths43.China has over ________ of the world’s high-speed railways.A.second third B.two thirds C.two third44.—What do you think of the environment here —Wonderful! ________ of the land ________ covered with trees and grass.A.Two fifths, are B.Two fifth, is C.Two fifths, is D.Second five, are45._________ of the land in that district is covered with trees and grass.A.Two-fifth B.Two-fifths C.Second-fifths D.Two-fives46.________ of the students in our class are from Nanjing.A.Three quarters B.Three fourth C.Third fourths D.Three fours47.The number of the fans going to this concert is about three ________. And ________ of them are girls.A.thousand; two third B.thousand; two thirds C.thousands; two thirds48.________ of the students in our class are familiar (熟悉的) with Zhenjiang.A.Two-fifth B.Two-fifths C.Five-seconds D.Second-fifth49.About ______ of the teachers in our school are women.A.three fourth B.three fourths C.third fourths D.third fourth50.Because of the special situation last year, about _________ of the students in our school _______ having classes on the Internet at home.A.two thirds; are B.two third; isC.two thirds; was D.two thirds; were51.—The ocean covers ________ of the earth’s surface.—That’s why people call our earth the “Blue Planet”.A.a half B.a third C.two thirds D.a quarter52.There are fifty students in this class, and ________ of them are boys, so the number of the boys is 30.A.three fifth B.three fifths C.three five D.third fifths53.It says that ________ of the water around the world ________ polluted.A.Two thirds; have B.two thirds; is C.two third; are54.The environment here is better now because ________ of the land ________ covered with plants.A.three fourth; is B.three fourths; is C.three fourths; are D.three fourth; are55.—About ________ of the workers in the factory were born in the ________.—We all really admire them because all of them ________ the factory for more than 20 years.A.two-thirds; 1970s; have been in B.two-thirds; 1970; has joinedC.two-third; 1970; has been at D.two-third; 1970s; have been a member of56.About ________ of the students in our class like playing basketball.A.two fifth B.two fifths C.second fifths D.seconds fifth57.________ of the workers in the factory are men.A.Three fifths B.Three fifth C.Third fifth D.Third fifths58.With the help of AI, ________ of the time will be saved when we deal with such problems.A.two third B.two three C.second three D.two thirds59.Nearly ________ of the earth is covered by sea, but 95 percent of it ________ salty water.A.three fourth; is B.three fourths; is C.three fourth; are D.three fourths; are60.In our class _______ of the students ______ girls.A.three fifths; are B.three fifth; are C.three fifth; is/ 讓學習更有效 新課備課備考 | 英語學科/ 讓學習更有效 新課備課備考 | 英語學科21世紀教育網(www.21cnjy.com)21世紀教育網(www.21cnjy.com)參考答案及試題解析1.D【解析】句意:閱讀下面的信息。根據圖表,哪一個是正確的?考查數字運算。根據表格中的信息“Free time each day”可知,三個人中 Nancy的空閑時間最多,其次是John,最后是Daniel,所以John的空閑時間比Nancy少。故選D。2.A【解析】句意:在我們學校五分之三的學生是男生。考查分數表達和主謂一致。分數表達法為“分子基數詞,分母序數詞,分子大于一時,分母要加s”,所以“五分之三”的正確表達為“three fifths”;“分數+of+名詞”作主語時,謂語動詞的形式要和該名詞保持一致,此處名詞students是復數,be動詞要用are,故選A。3.B【解析】句意:據說世界上三分之二的水被污染了。考查分數表達及被動語態。分數表達中分子用基數詞,分母用序數詞,當分子大于一時,分數要變為復數。表示“三分之二”要用two thirds,排除C;主語water與動詞之間是被動關系,應該用被動語態be done,表示“被污染”用be polluted,此處是一般現在時的被動語態,可排除A和D,故選B。4.B【解析】句意:據說世界上三分之二的水被污染了。考查分數的表達和主謂一致。分數的表達:分子用基數詞,分母用序數詞,分子大于一,分母加s,因此第一空two thirds符合句意;結合“the water”是不可數名詞,謂語動詞用is。故選B。5.C【解析】句意:——我們班五分之四的學生通過了考試。——哦,那意味著他們中的20%應該更加努力。考查分數表達。One fifth五分之一;Four five四五;Four fifths五分之四;One five一五。根據“20% of them should work harder”可知,有20%的學生沒通過考試,即五分之一的學生沒通過考試,那么通過考試的人數占五分之四。Four fifths表示五分之四。故選C。6.D【解析】句意:六班四分之三的學生在學校吃午飯。考查分數表達。 分子用基數詞,分母用序數詞,當分子不為一,分母變復數形式。故選D。7.C【解析】句意;據說世界三分之二的水都被污染。考查分詞的表達和主謂一致。基數詞作分子,序數詞作分母,除了分子是“1”以外,其他情況下序數詞都要用復數形式。表達“三分之二” 用“two thirds”。“分數 of+名詞”做主語時根據名詞來判斷謂語動詞的單復數,“water”是不可數名詞,表示“被污染”用“is polluted”。故選C。8.A【解析】句意:——你認為這里的環境怎么樣?——棒極了!五分之二的陸地被樹木和草所覆蓋。考查分數表達法和主謂一致。英語中,分數表達用基數詞作分子,用序數詞作分母,分子大于1,分母用復數形式,作主語時謂語動詞的數由名詞來定;結合選項,two fifths表達正確,意思是“五分之二”,可排除BD兩項;后空land意為“陸地,土地”,為不可數名詞,根據主謂一致的原則,需用is,故選A。9.D【解析】句意:根據一項調查,五分之四的女性在家做家務,但只有五分之二的男性愿意這樣做。考查分數表達。根據空前的but only可知此處表示做家務的男人數量比女性少,分數應該比五分之四小,排除AB;結合選項可知,“五分之二”符合題意。在英語中表達分數時,分子用基數詞,分母用序數詞。如果分子大于1,分母要用復數形式。故選D。10.A【解析】句意:小鎮車的數量大約七百輛,三分之二是舊車。考查數詞用法。hundred前面有具體數字時,用單數;分數的表示,分子是基數詞,分母是序數詞,分子大于1時,分母用復數。故選A。11.C【解析】句意:我們班五分之三的學生能解決這個問題。考查數詞。表示分數時,分子用基數詞,分母用序數詞,當分子大于一時,分母用復數形式,three fifths表示“五分之三”,故選C。12.A【解析】句意:我們班五分之三的學生是女生。考查分數表達。英語表達分數時,分子為基數詞,分母為序數詞,分子大于1時,分母用復數,所以五分之三表達為three fifths,故選A。13.A【解析】句意:這個地區三分之一的土地被森林覆蓋。考查分數表達及主謂一致。分數的表達方式為“分子用基數詞,分母用序數詞,若分子超過了1,分母用序數詞的復數”,所以“三分之一”為one third;分數作主語時,謂語動詞和of后的名詞保持一致,land為不可數名詞,謂語動詞用單數形式,故選A。14.A【解析】句意:在我們班五分之三的學生是男生。考查數詞和主謂一致。three fifths五分之三,are是,主語是you或復數形式;is是,主語是第三人稱單數形式;分子大于一時,分母加s,因此排除BD兩項;主語students是復數形式,謂語用復數形式,故選A。15.B【解析】句意:我們學校大約五分之二的學生騎自行車上學。考查分數表達及主謂一致。分數分子用基數詞,分母用序數詞,分子大于1時,分母用復數,“五分之二”用two fifths表達;分數修飾students作主語,students是復數,其后用動詞原形。故選B。16.C【解析】句意:他的作品有四分之三是在五十幾歲時寫的。考查數詞。分數的表達:當分子大于一時,分母加s,排除B選項。分析和分母之間的表達不加連字符,排除A選項。fifties五十幾;fiftieth第五十;表示某人幾十多歲這樣的約略年齡,用“in one’s+逢十的基數詞的復數(如tens, twenties, thirties等)”來表達。in one’s fifties在某人五十幾歲時,故選C。17.D【解析】句意:這個城市五分之二的土地被樹木和草覆蓋著。考查分數表達方式。分數表達方法: 基數詞+ 序數詞,基數詞作分子,序數詞做分母, 如果分子(基數詞)是大于1,分母(序數詞)要變成復數,表示“五分之二”用two fifths。故選D。18.C【解析】句意:我們班有五十名學生,三分之二的人喜歡乒乓球。考查分數的表達及主謂一致。分數的表達為基數詞作分子,序數詞作分母。當分子大于1時,分母上要加-s,因此第一個空填two thirds;而謂語動詞的單復數取決于分數之后的名詞,由“us”可知,不能用likes。故選C。19.C【解析】句意:三分之二的學生都來自中國。考查分數。根據“of students”可知,此處應用分數,分子用基數詞,分母用序數詞,分子大于一,分母用復數,Two thirds即“三分之二”,符合表達,故選C。20.B【解析】句意:——你的工作進展如何?——我們已經完成了五分之二。考查分數表達。英語表達分數時,分子為基數詞,分母為序數詞,分子大于1,分母加-s,所以五分之二表達為two fifths,故選B。21.D【解析】句意:這是一個大班,四分之三的學生是女生。考查分數的表達,在英語分數中,分子有基數詞,分母用序數詞,當分子大于1時,分母要+s。排除選項ABC。three quarters表示“四分之三”符合語境,故選D。22.B【解析】句意:大約四分之三的地球被水覆蓋。考查分數的表達。分數的表達為:分子為基數詞,分母為序數詞,當分子大于1時,分母用復數形式,所以四分之三的表達為three quarters或three fourths,故選B。23.C【解析】句意:海洋占據了地球表面的四分之三。考查分數表達。英語中,分數表達通常為:分子用基數詞,分母用序數詞,當分子大于1時,分母的序數詞+s。“quarter”本身就有“四分之一”的意思,所以“四分之三”也可說“three quarters”。故選C。24.B【解析】句意:中國是世界上人口最多的國家,世界上大約五分之一的人生活在中國。考查形容詞最高級和分數的表達。lager形容詞large的比較級;one fifth五分之一;the largest形容詞large的最高級,最大的;largest形容詞large的最高級,前面有物主代詞或名詞所有格等情況時使用;one fifths表述錯誤;large大的,形容詞原級。根據第一空前后has和in the world可知,中國在世界上人口最多,所以這里用最高級the largest。第二空是分數的表達:分子用基數詞,分母用序數詞(如果分子大于一,分母序數詞用復數),所以“五分之一”是one fifth,排除選項C和D。故選B。25.B【解析】句意:20世紀60年代,大約三分之二的人過著艱難的生活。考查分數表達和世紀表達。分數表達法:分子用基數詞,分母用序數詞,分子大于一,分母加s;1960s表示“20世紀60年代”,也可以寫作1960’s。故選B。26.B【解析】句意:這所學校超過三分之二的學生參加了調查。考查分數表達。英語中一般用基數詞表示分數的分子,用序數詞表示分數的分母,當分子是一時,分數的分母用單數形式;當分數的分子大于一時,分數的分母要用復數形式,可排除AC選項;根據空前的“Over”可知,D項all“所有”不符合邏輯。故選B。27.B【解析】句意:——我們學校有200名教師,其中四分之三是女教師。考查數詞和分數的表達。根據“two hundred”可知,表示具體數量時,hundred不加s,排除A;根據“three fourths”可知,分數表達中,分子大于1時,分母用復數形式,排除C;選項D中的“two hundred of”表達錯誤,不符合語法規則。故選B。28.B【解析】句意:大約五分之二的人不喜歡看電影。考查英語中分數的表達。英語中的分數由基數詞和序數詞一起表示,基數詞作分子在前,序數詞作分母在后,分子大于1,分母要用復數形式。故“五分之二”的正確表達為two fifths。故選B。29.C【解析】句意:城市的四分之三都被樹覆蓋了。考查數詞分數表達法。英語中表達分數時,分子用基數詞,分母用序數詞。分子大于一時,分母要加s。四分之三可表達為:three fourths,three quarters。故選C。30.C【解析】句意:現在,這里三分之二的老人習慣于晚飯后在廣場上跳舞。考查分數的表達。根據英語表達習慣,分數的表示方式為“基數詞+序數詞”,其中基數詞作分子,序數詞作分母,當分子數大于1時,作分母的序數詞要用復數形式,B、D選項可排除。當句子主語是分數或百分數時,謂語動詞的單復數由of后面的名詞決定,空格后the old people為復數概念,故be動詞應用are。故選C。31.B【解析】句意:海洋覆蓋了地球表面大約三分之二,所以我們稱地球為“藍色星球”。考查分數的表達。根據“Oceans cover about ... of the earth’s surface”和常識可知,海洋約占地球表面的71%,接近三分之二。故選B。32.A【解析】句意:—— 你能正確讀出數字36.36嗎?—— 是的,我可以把它讀成 thirty-six point three six。考查小數的英語讀法。小數的讀法是:整數部分按整數讀法讀,“.”讀作“point”,小數部分依次讀出每個數字。36讀作“thirty-six”,“.36”讀作“point three six”,所以36.36讀作“thirty-six point three six”,故選A。33.C【解析】句意:17.17能被讀成seventeen point one seven。小數點左邊的整數部分按整數讀法或按個位基數詞依次讀出。小數點右邊的小數部分按個位基數詞依次讀出。在小數點后遇到零時,可讀做zero,也可以讀做字母O的音。如seventeen point one seven讀作17.17,根據題意,故選C。34.C【解析】句意:——四個中最小的數是多少?——四分之一。考查分數表示法。Two thirds三分之二;A half 二分之一;A quarter四分之一;Three fourths四分之三。英語中表示分數時,分母用序數詞,分子用基數詞,當分子大于1時,表示分母的序數詞后要加s,所給選項中最小的是四分之一。故選C。35.B【解析】句意:從這項研究中,我們了解到地球約五分之三的面積被森林覆蓋。考查分數表達法。分數表達中分子應用基數詞,分母用序數詞,當分子大于1的時候,分母用復數。“three-fifths”準確表示“五分之三”,符合語法要求。故選B。36.C【解析】句意:1850年,美國大約有三分之一的土地被森林覆蓋。 考查分數表達法。third第三;the third第三個;a third三分之一;a thirds錯誤表達。根據“about ... of the land”及分數表達規則,此處應使用“a third”表示“三分之一”。故選C。37.C【解析】句意:我們學校有一百多名老師。他們中有五分之二是男教師。考查分數表達法和復合名詞復數變化規則。英語中的分數由基數詞作分子,序數詞作分母構成。除了分子是“1”以外,其他情況下序數詞都要用復數形式;系動詞are后接復數名詞,man為單數名詞,復數形式為men,作定語修飾名詞時,man的形式與后面名詞的單復數形式保持一致。故選C。38.A【解析】句意:今年九年級大約五分之四的學生出生于20世紀90年代。考查分數和年代的表達。分數是由基數詞和序數詞一起來表示的。基數詞作分子,序數詞作分母,除了分子是“1”以外,其他情況下序數詞都要用復數形式。表示在某個世紀的幾十年代,用“in the +逢十的基數詞的復數”。基數詞的復數若用阿拉伯數字表示,可直接加s,也可加’s。分析選項可知,只有選項A符合。故選A。39.A【解析】句意:大約五分之三的人喜歡這部電視劇。其中70%的音樂都是原創的。考查數詞和主謂一致。three fifths五分之三;分子大于一時,用復數形式;故排除CD兩項。is是,是第三人稱單數形式;are是,是復數形式;分數或百分數修飾名詞,作主語,謂語根據所修飾的名詞判斷,此處music是不可數名詞,因此謂語用第三人稱單數。故選A。40.B【解析】句意:根據上周的調查,大約四分之三的學生參加戶外活動來釋放學習壓力。考查分數的表達。分數由分子和分母構成,分子用基數詞,分母用序數詞;當分子大于1時,分母需加“s”;根據選項可知,此處表達四分之三應用three fourths表示。故選B。41.C【解析】句意:——我們班五分之四的學生通過了考試。 ——哦,那意味著 20% 的學生需要更努力。考查數詞和主謂一致。根據“that means 20% of them should work harder”可知,20%的學生需努力,據此可以推斷,80%的學生已經通過了考試,對應的分數為four fifths“五分之四”;主語“four fifths of the students”為復數概念,謂語動詞應用原形“have”。故選C。42.D【解析】句意:根據一項調查,五分之四的女性在家做家務,但只有五分之二的男性愿意這樣做。考查分數的表達。表達分數時,分子用基數詞,分母用序數詞,當分子大于1時,分母要用復數,因此排除A、C兩項;根據“four out of five women do housework at home, but only …of men will do it.”可知,男性做家務的數量少于女性,女性為五分之四,那么男性應少于五分之四,排除選項B。故選D。43.B【解析】句意:中國擁有世界上三分之二的高速鐵路。考查分數的表達。分數的表達為:分子用基數詞,分母用序數詞,分子大于一,分母加s,因此“三分之二”應說two thirds。故選B。44.C【解析】句意:——你認為這兒的環境怎么樣?——好極了!五分之二的土地被樹和草覆蓋著。考查分數的表達及用法。英語中分數表達方式為:分子用基數詞,分母用序數詞,當分子大于1的時候,分母要加s,五分之二應表達為two fifths;“分數+of+名詞”作主語時,謂語動詞應與名詞的數保持一致,結合land為不可數名詞,所以be動詞用其三單形式is。故選C。45.B【解析】句意: 該地區五分之二的土地被樹木和草地覆蓋。考查分數表達。分數表達規則:分子基數詞 (two),分母序數詞 (fifths),分子>1時分母加“s”。故選B。46.A【解析】句意:我們班四分之三的學生來自南京。 考查分數表達法。 英語中分數的表達規則為:分子用基數詞,分母用序數詞,若分子大于1,分母需用復數形式。選項B、C、D都不正確,three quarters相當于three fourths,表示“四分之三”。故選A。47.B【解析】句意:去聽這場音樂會的歌迷人數大約有三千人,其中三分之二是女孩。考查數詞。根據“about three...”可知,空前有數詞three,空處應是thousand的單數形式;分數的分子為基數詞,分母為序數詞,當分子大于一時,分母用復數形式,第二空應是two thirds。故選B。48.B【解析】句意:我們班五分之二的學生熟悉鎮江。考查序數詞。根據“...of the students in our class are familiar with Zhenjiang”可知,分子用基數詞,分母用序數詞;當分子大于一時,分母用復數形式。因此,五分之二的正確表達應為“two-fifths”。故選B。49.B【解析】句意:我們學校大約四分之三的教師是女性。考查分數的表達。分數的表達:分子用基數詞,分母用序數詞。當分子大于 1 時,分母需變為復數形式(即加 -s),所以四分之三為three fourths。故選B。50.D【解析】句意:由于去年的特殊情況,我們學校約三分之二的學生在家通過互聯網上課。考查分數的表達以及主謂一致和時態。空一處表示分數,分子用基數詞,分母用序數詞,當分子大于1時,分母需用復數,因此此處三分之二應表示為two thirds;“分數+of+名詞”作主語時,謂語動詞常與of后的名詞保持數的一致,of后the students是可數名詞復數,則謂語動詞用復數形式,且根據“last year”可知,時態用一般過去時,因此be用were。故選D。51.C【解析】句意:——海洋覆蓋了地球表面的三分之二。——這就是為什么人們稱我們的地球為“藍色星球。考查分數表達和常識。a half二分之一;a third三分之一;two thirds三分之二;a quarter四分之一。根據“Blue Planet”可知,海洋占比較大,再結合常識可知,海洋大約覆蓋了地球表面的三分之二。故選C。52.B【解析】句意:這個班有50名學生,其中五分之三是男生,所以男生人數是30人。考查分數表達法。three fifth表述錯誤;three fifths五分之三;three five表述錯誤;third fifths表述錯誤。分數表達由分子和分母組成,分子用基數詞,分母用序數詞;當分子大于1時,分母要用復數形式;五分之三,分子是3,用基數詞three;分母是5,用序數詞fifth,由于分子3大于1,所以分母fifth要變為復數形式fifths,即three fifths。故選B。53.B【解析】句意;據說世界三分之二的水都被污染。考查分數表達和主謂一致。基數詞作分子,序數詞作分母,分子大于“1”時,其他情況下序數詞都要用復數形式。表達“三分之二”用“two thirds”;“分數 of+名詞”作主語時根據名詞來判斷謂語動詞的單復數,“water”是不可數名詞,be動詞用is。故選B。54.B【解析】句意:這里的環境現在更好了,因為四分之三的土地都被植物覆蓋了。考查分數表達和主謂一致。分數的表達方式為“基數詞+序數詞”,基數詞是分子,序數詞是分母,分子大于1時,分母用復數,故 “四分之三” 表達為three fourths;“分數 + of + 名詞” 作主語時,謂語動詞與名詞一致,land為不可數名詞,謂語用單數is。故選B。55.A【解析】句意:——這家工廠大約三分之二的工人是20世紀70年代出生的。——我們都很欽佩他們,因為他們都在工廠里干了20多年。考查分數、年代的表達以及現在完成時。根據“About…of the workers in the factory”可知,此處表示這家工廠的三分之二的工人,英語中分數的表達規則為:分子用基數詞,分母用序數詞,如果分子大于1,分母需變為復數形式,故第一空應填two-thirds;根據“in the…”可知,第二空為年代,結構為“in the+年份復數”,故第二空應填1970s;根據“for more than 20 years”可知,此處應用現在完成時,in the factory“在工廠里”,故第三空應填have been in。故選A。56.B【解析】句意:我們班大約五分之二的學生喜歡打籃球。考查分數表達法。英語中分數的表達規則為:分子用基數詞,分母用序數詞;當分子大于1時,分母需加-s。此處“五分之二”的正確表達應為“two fifths”。故選B。57.A【解析】句意:這家工廠里五分之三的工人是男性。考查分數的表達。分數的表達方式為“基數詞+序數詞”,分子用基數詞,分母用序數詞,分子大于1時,分母用復數,故“五分之三”為three fifths,故選A。58.D【解析】句意:在人工智能的幫助下,我們處理此類問題時將節省三分之二的時間。考查分數表達。分數表達規則:分子用基數詞,分母用序數詞;當分子>1時,分母要加s,所以三分之二表示為“two thirds”。故選D。59.B【解析】句意:地球將近四分之三被海水覆蓋,但是95%的水是咸水。考查分數表達法以及主謂一致。分子用基數詞,分母用序數詞。分子大于一,分母用復數。“四分之三”的表達方式為three fourths,排除A和C;“分數/百分數+of+名詞”作主語時,謂語動詞與名詞保持一致,本句話中it代指earth,be動詞用is,故選B。60.A【解析】句意:我們班五分之三的學生是女生。考查分數表達和主謂一致。分數表達規則:分子用基數詞,分母用序數詞,分子大于1時分母加-s,故“五分之三”應為three fifths。根據主語“students”是復數,謂語動詞需用復數形式are。故選A。21世紀教育網(www.21cnjy.com)21世紀教育網(www.21cnjy.com) 展開更多...... 收起↑ 資源預覽 縮略圖、資源來源于二一教育資源庫