资源简介 / 让学习更有效 暑假自学课 | 英语学科【弯道超车】2025年九年级年级英语暑假自学习精讲精练(通用版)专题32 数词的用法一、数词的分类数词分为基数词(Cardinal Numbers)和序数词(Ordinal Numbers)。基数词:表示数量(如:one, two, three)。序数词:表示顺序(如:first, second, third)。二、基数词的用法1. 表示数量There are twenty students in the class.(班上有20名学生。)She has three apples.(她有3个苹果。)2. 表示年龄He is ten (years old).(他10岁。)She started school at the age of six.(她6岁开始上学。)3. 表示时间(小时)It's eight o'clock.(现在是8点。)The meeting starts at three fifteen.(会议3:15开始。)4. 表示编号Room 202(202房间)→ Room two zero twoPage 50(第50页)→ Page fiftyBus No. 5(5路公交车)→ Bus five5. 表示年份1997 → nineteen ninety-seven2008 → two thousand and eight2025 → twenty twenty-five6. 表示电话号码876-5432 → eight seven six, five four three two三、序数词的用法1. 表示顺序He is the first to finish.(他是第一个完成的。)Today is her twelfth birthday.(今天是她的12岁生日。)2. 表示日期May 1st(5月1日)→ May the first(英式) / May first(美式)October 23rd(10月23日)→ October the twenty-third3. 表示楼层She lives on the third floor.(她住在3楼。)The library is on the tenth floor.(图书馆在10楼。)4. 表示世纪、年代the 21st century(21世纪)in the 1990s(20世纪90年代)5. 表示排名He won first prize.(他获得了一等奖。)She came in second place.(她获得了第二名。)四、数词的特殊用法1. 分数表达1/2 → a/one half1/3 → a/one third1/4 → a/one fourth(或a/one quarter)3/4 → three fourths(或three quarters)2/5 → two fifths2. 小数表达0.5 → zero point five3.14 → three point one four3. 百分数表达25% → twenty-five percent100% → one hundred percent4. 倍数表达twice(两倍)three times(三倍)This room is twice as big as that one.(这个房间是那个的两倍大。)5. 年龄表达in one's twenties(二十多岁)in one's thirties(三十多岁)五、易错点总结1、基数词 vs. 序数词基数词:one, two, three(表示数量)。序数词:first, second, third(表示顺序)。2、hundred/thousand/million具体数字不加s:three hundred(300)。概数加s:hundreds of(数百)。3、序数词拼写变化five → fifth, twelve → twelfth, twenty → twentieth。4、日期表达英式:May the first美式:May first5、分数表达分子用基数词,分母用序数词(分子>1时,分母加s):two fifths(2/5)。1. , Coca Cola began to enter China's market.A.In l970's B.In l970sC.In the l970s' D.In the l970s2._______the students in the school can speak Japanese.A.Hundreds B.Three hundred ofC.Three hundreds D.Hundreds of3.The socks are four dollars for one pair. So I need_______ dollars to buy five pairs.A.eight B.twelve C.twenty D.thirty4.— Mom, I bought _______ eggs yesterday, but now none is left.— Oh, they were put under the table.A.dozen B.dozen of C.dozens of5._______ of the materials I listened to at the beginning of the exam _______ easy.A.Three fourths; is B.Third four; areC.Three fourths; are D.Three fourth; are6.It is common in ______ that people in ______ are going to university for further educationA.1990s; the fiftieth B.the 1990s; fiftiesC.the 1990s; their fifties D.1990s; their fifties7.—What time is it —It's_________.A.half to three B.five past fortyC.twenty past one D.twenty four8.David Beckham has ______ children. Brooklyn Beckham is his ______ son.A.third, first B. three, one C.three, first D.third, one9.When he arrived at the airport, the star found that ____________________ fans were waiting for him there.A.hundred B.hundreds C.hundred of D.hundreds of10.________of the students in our class________ going to the summer camp in Beijing next week.A.Two fifths; are B.Second fifths; areC.Two fifths; is D.Two fifth; are11.—When did the Internet first appear in China — .A.In 1980s B.In the 1980s C.In the 198012.There are flowers on the desk.Ten are black and twenty are red.A.five B.ten C.twenty D.thirty13.—Though he is only a ________ boy. He knows a lot.—You're right. He is good at learning.A.5-year-old B.5 years old C.5-years-old14._______ of the area _______ covered by trees.A.Two-third; is B.Two thirds; isC.Two-third; are D.Two thirds; are15.Look! There are ducks swimming in the river.A.four hundreds B.four hundreds ofC.hundreds D.hundreds of16.The boy is ____. Today is his ____birthday.A.twelfth, twelfth B.twelve, twelveC.twelve, twelfth D.twelfth, twelve17.Open your books and turn to page . Let's read aloud Lesson .A.thirty. ..Six B.thirtieth…SixC.thirtieth…Sixth D.thirty…Sixth18.He is a collector. He has ______ basketballs.A.twenty three B.twenty-three C.two ten three D.three-twenty19.There are _____months in a year. _____ month is December.A.twelfth, Twelfth B.twelve , TwelveC.twelfth , The twelfth D.twelve , The twelfth20.I need ____________ to finish my work.A.two hours and half B.two and a half hoursC.two hour and a half D.two and a half hour21.My mother will be years old next week. I'm planning to buy a gift for her birthday.A.fourty; fourtieth B.forty; fortiethC.fourty; fortieth D.forty; fourtieth22._______________ people prefer HUAWEI phones, and about _______________ of them are adults.A.The number of; four-fifths B.A number of; four-fifthC.A number of; four-fifths D.The number of; four-five23.—How are you getting along with your work —We have finished _______of it.A.two five B.two fifths C.two fifth D.second fifths24._______ of the area _______ covered by trees.A.Two-third; is B.Two thirds; is C.Two-third; are25.How can you read 17,832 in English A.Seventeen thousand eight hundred thirty-two.B.Seventeen thousand eight hundred and thirty-two.C.Seventeen thousand and eight hundred thirty-two.D.Seventeen thousand and eight hundred and thirty-two.26.—How old is your daughter —______. We had a special party for her_____birthday yesterday.A.Nine; nine B.Nine; ninth C.Ninth; ninth D.Ninth; nine27.—What's five minus(减) two —____A.Two. B.Three. C.Four. D.Seven.28.About of the earth covered with water, but we have less and less fresh water.A.three-fourth; are B.three-fourths; isC.three-fourth; is D.three-fourths; are29.There are five _______students in this school.A.hundred B.hundreds C.hundreds of30.—Can you help me write down my address on this envelope It is ________.—No problem.A.87, Island Street B.Island Street, 87C.on 87, Island Street D.in Island Street, 8731.—How old is your grandpa —Oh, he's______ years old.A.nineteen B.ninty C.ninety32.Tomorrow is my uncle's birthday. He will be years old.A.forty; fortieth B.forty; forty C.fortieth: forty33.— How many books are there on the teacher's table — . Forty IT books and fifty maths books.A.Sixty B.Seventy C.Eighty D.Ninety34.My car number is 53659. It reads(读作) ______________.A.five three six five nine B.five four six five nineC.five four five six eight D.five three seven eight nine35.It took us to finish the new research report.A.three hour and a halfB.three and a half hoursC.three and half hours36.—Reading in this library is my favorite in my life.—Really ______ will interest you, ______ of the books will be cost free here.A.It; fifth-twos B.They; percent fortyC.This; two-fifths D.That; forty percent37.There are more than six people on the big playground.A.thousand B.thousands C.thousand of D.thousands of38.I spent making the booklet about how to keep kittens.A.two and a half hours B.two hour and a halfC.two hours and a half hours D.two and a half hour39.We can read the time 3: 45 as .A.a quarter to three B.fifteen past threeC.a quarter to four D.a quarter past three40.Four and four is _________ .A.six B.seven C.eight D.nine41.About of English teachers in our school are under the age of 40.A.three-fifths B.three-fifth C.third-fifth D.third-fifths42. It's reported that ____ of the students ____ glasses.A.three fifth; wearsB.three fifths; wearsC.three fifths; wear43.There are more than one hundred teachers in our school. ________ of them are _______.A.Two fifth, man teachersB.Second fifths, men teacherC.Two fifths, men teachers44.The boy is only _____ and today is his _____ birthday.A.nine; nine B.ninth; nine C.nine; ninth45.—We have only _____ kinds of T-shirts. Which one would you like —The ______ one. I prefer the color.A.three, third B.third, three C.three, three D.third, third46.It is said that the gravity on Mars is only about of the gravity on earth.A.three-eighths B.third-eighth C.third-eighths D.third-eight47.It is said that the gravity on Mars is only about __________ of the gravity on earth.A.three-eighths B.third-eighth C.three-eighth D.third-eighths48._____of the warm water _____already been used up.A.Two-third;has B.Two-third;haveC.Two-thirds;has D.Two-thirds;have49.—How old is your son —________. And December 1st is his ______ birthday.A.Twelve, twelfth B.Twelfth, twelveC.Twelve, twelve D.Twelfth, twelfth50.—Hello, Li Jun! How many students are there in your school —There are about _____ students.A.three thousand B.three thousandsC.three thousand of D.three thousands of参考答案及试题解析1.D【解析】句意:可口可乐在20世纪70年代开始进入中国市场。in the 1970s意为“在二十世纪七十年代”。故选D【点评】考查年代的表达。2.D【解析】句意:学校里有数百名学生会说日语。hundred百,表示几百用基数词+hundred,排除B、C;hundreds of数百,固定搭配,故选D。【点评】考查数学词表达,注意平时识记表示几百用基数词+hundred和固定搭配hundreds of。3.C【解析】句意:这双袜子一双是四美元。所以我买五双需要二十美元。eight八;twelve十二;twenty二十;thirty三十。一双袜子4美元,五双袜子4*5=20美元。故选C。【点评】考查数词,注意数字的乘法运算和数词的写法。4.C【解析】句意:—妈妈,昨天我买了几十个鸡蛋,但是现在一个都没有了。—哦,它们被放在桌子下面。dozen,打,十二个。用法等同于hundred:数词+dozen+名词复数;dozens of+名词复数。所以two dozen eggs两打鸡蛋;dozens of egg几十个鸡蛋。空格前没有数词,所以用dozens of形式,故答案为C。【点评】考查dozen的用法,联系hundred、thousand、million等词的用法。5.C【解析】根据题干,第一个空是分数。在英语中表示分数时,分子用基数词,分母用序数词,分子超过1的,分母要加s,故用排除BD;根据本句的主语the materials可知,此处应该用are。所以本题选C。【点评】本题需要熟练掌握分数的表达方法;另外,第二个空前面题干比较长,需要认真分析本句的主语是什么,这是较难的。6.C【解析】句意:在20世纪90年代,人们在50多岁的时候上大学深造是很普遍的。考查数词。根据in+年份表示在某一年,年代表示是in+ the+逢十的复数数词;in+ one's +整十的复数表示某人几十多岁时,第一空表示在20世纪90年代,第二空表示某人50多岁的时候,故答案选C。【点评】考查数词的用法,注意固定搭配。7.C【解析】句意:——现在几点了?——现在一点二十了。根据表示时间的构造为half+past+小时,几分+past+小时,小时+几分,可知,A、B、D选项都错误,故C选项正确,故答案为C。【点评】考查了表示时钟的短语构造,注意时钟构造形式为half+past+小时,几分+past+小时,小时+几分。8.C【解析】句意:大卫。贝克汉姆有三个孩子,布鲁克林·贝克汉姆是他的第一个孩子。基数词表示名词的数目的多少,序数词表示事物的顺序。根据句意,故选C。【点评】考查数词的用法。9.D【解析】句意:当他到达机场时,这位明星发现有数百名粉丝在那里等他。hundred百,表示几百用基数词+hundred,句子中没有基数词,排除A。表示数百用hundreds of,固定搭配,排除B、C,故选D。【点评】考查数学词表达,注意识记固定搭配表示几百用基数词+hundred和表示数百用hundreds of,理解句意。10.A【解析】句意:我们班五分之二的学生打算下周去北京参加夏令营。分子大于1时,做分母的序数词用复数,因此五分之二的表达应该是 two fifths,排除B,D;分数后面的名词为复数名词students,根据主谓一致的原则,只能用are,故选A。【点评】考查主谓一致,注意分数修饰名词做主语的时候谓语动词与名词的单复数一致。11.B【解析】句意:——中国的互联网是什么时候出现的?——20世纪80年代。表示在哪一年应使用 in +年,则选项A、C错误,in the +基数词表示的正十年份+s,表示年代,故选B。【点评】考查英语中年代的表示形式,年代和年份的表示形式应熟练掌握。12.D【解析】句意:课桌上有三十朵花。十朵是黑色的二十朵是红色的。根据后句可知10+20=30, 故选D。【点评】考查数词的用法。熟记英语中数词的表达方式。13.A【解析】句意:——尽管他只是一个5岁的男孩。他知道很多。——你说得对。他善于学习。表示年龄时可用基数词+years+old,作表语;或基数词-year-old,作定语修饰名词。根据空格后名词boy,可知空格处作定语,应用 5-year-old 。故选A。【点评】考查基数词+单数名词+形容词。注意掌握基数词+单数名词+形容词构成合成形容词,如:一座800米长的桥an 800-metre-long bridge;女子400米接力girls‘400-metre race。14.B【解析】句意:这个地区三分之二被树木覆盖着。分数的构成:分子基数词,分母序数词,分子大于一,分母加-s。分数作主语,谓语动词的单复数根据分数后面的名词而定。area是不可数,故选B。【点评】考查分数和主谓一致。15.D【解析】句意:看!这里有好几百只鸭子在河里游泳。当hundred前有一个具体的数词做定语修饰时,只有它后面名词是复数,故AB错误。hundreds不能单独使用,后面要跟of +名词复数;所以C错误,hundreds of,数百…… ,表示笼统数字,故答案选D。【点评】考查数学词表达,注意平时识记基数词+hundred和hundreds of。16.C【解析】这个男孩……,今天是他的……生日。前面应该是表示数量,十二,后面用序数词,表第十二岁,故答案选C。【点评】考查基数词与序数词的用法。17.A【解析】句意:把书打开并翻到第30页。我们大声朗读第六课。在英语中表示“第几页”常用page+基数词,thirty:三十,基数词;thirtieth第三十,序数词,所以排除B/C,表示“第几课”常用Lesson+基数词,six六,基数词;sixth第六,序数词,故答案为A。【点评】考查基数词。注意识记基数词的用法。18.B【解析】句意:他是一位收集者。他有二十三个篮球。二十三,twenty-three,基数词,故选B。【点评】此题考查基数词的使用。注意基数词的拼写。19.D【解析】考查数词的应用。句意:一年里有十二个月。第十二个月是十二月,第一个空白处答案为为,基数词十二 twelve,第二个空白处答案为序数词 第十二 twelfth 。A. twelfth, 第十二 Twelfth 第十二 B. twelve ,十二 Twelve 十二C. twelfth ,第十二 The twelfth 第十二 D. twelve ,十二 The twelfth 第十二故答案为D。20.B【解析】句意:我需要两个半小时来完成我的工作。根据两个半小时的表达为:two hours and a half /two and a half hours,可知B选项符合题意。故选B。【点评】考查时间表达。注意熟记动词need"需要":第三人称单数: needs;现在分词: needing;过去式: needed;过去分词: needed。21.B【解析】句意:我妈妈下星期就四十岁了。我打算为她四十岁生日买件礼物。考查数词。forty四十;fortieth第四十;第一空是年龄的表达,结构是基数词+years old,所以第一空用基数词,而A和C选项拼写错误,故排除A和C;第二空表达的是第……岁生日,应用序数词表示,D的 fourtieth 拼写错误,故选B。【点评】考查数词,注意基数词+years old和序数词的用法。22.C【解析】句意:大量的人更喜欢华为手机,大约他们中五分之四的是成年人。the number of+可数名词复数,表示......数量是......;a number of+可数名词复数,表示大量......;大量的人喜欢华为手机,所以用a number of,排除A、D。英文分数表达:分母用序数词,分子用基数词,分子大于一时分母用复数。五是分母,所以用序数词fifth,四是分子,所以用基数词four,分子4大于1,所以分母fifth用复数fifths,所以五分之四用four-fifths,故选C。【点评】考查短语辨析及分数表达,注意平时识记固定搭配。23.B【解析】句意:—你的工作进展怎么样了?—我们已经完成了五分之二的工作。分数构成规则:分子基数词,分母序数词,分子大于一,分母加-s,所以五分之二为:two fifths,故答案为B。【点评】考查分数的构成:分子基数词,分母序数词。24.B【解析】句意: 三分之二的地区被树木覆盖。 "几分之几"的表达法是"基数词+序数词",如果基数词大于1,则要在序数词后加 s。同时也考查了其后be动词用单数还是复数的问题,关键取决于of后的名词是单数还是复数,这里是the area是单数形式,所以用单数is。此句分子是2,大于1,分母用序数词的复数形式。故选B。【点评】考查分数和be动词,注意分数的表示法和be动词的主谓一致的用法。25.B【解析】句意:你怎样用英语读 17,832 ?英语中没有万位单位,应用千位来表示,另外百位与十位之间用连字符号,seventeen thousand eight hundred and thirty-two,故选B。【点评】考查数字的读法,注意英文数字读法规则。26.B【解析】句意:——你女儿多大了?——9岁了。昨天我们刚为她举行了9岁生日的派对。表达年龄用基数词,而若表达第几个生日则用序数词。故选B。【点评】考查数词。注意识记基数词与序数词的用法。27.B【解析】句意:——5减2等于几?——3。根据"What's five minus(减) two "可知5减2等于3,故选B。【点评】考查数字计算。掌握几减几等于几形式的表达方法为"What's 数字 minus 数字?"28.B【解析】句意:地球的四分之三被水覆盖,但是我们的淡水却越来越少。英语的分数表达是基数词做分子,序数词做分母;当分子是一时,分母用单数,当分子大于一时,分母用复数;故3/4的表达是three fourths。分数做主语时,谓语动词的形式要根据分数修饰的名词来决定;当分数修饰的名词是复数时,谓语动词使用复数,当分数修饰的名词是单数,谓语动词使用单数(population除外,population做主语谓语动词使用单数;前有分数修饰时,谓语动词使用复数);本句中the earth是单数,可知谓语动词使用is。故选B。【点评】考查分数表达和主谓一致。29.A【解析】句意:在这个学校有500名学生。hundred百,表示几百用基数词+hundred;表示成百上千用hundreds of,固定搭配,five5,指的是基数词,所以用hundred,故选A。【点评】考查数学词表达,注意平时识记表示几百用基数词+hundred和表示成百上千用hundreds of。30.A【解析】句意:——你能帮我把地址写在这个信封上吗?是岛街87号。——没问题。表示第几大街,用基数词+街道的名称的顺序,此处是表语,故无介词,故选A。【点评】考查名词和基数词,注意识记表示第几大街,用基数词+街道的名称的顺序的用法。31.C【解析】句意:——你的爷爷多大了?——哦,他90岁了。A.19;B.表述错误;C.90;根据How old is your grandpa 可知问的是爷爷的年龄,所以是90岁符合题意,故选C。【点评】考查数学词用法,首先识记基数词意思,然后根据问句How old is your grandpa 确定答案。32.C【解析】句意:明天是我叔叔四十岁生日,他要四十岁了。forty四十,基数词;fortieth第四十,序数词。birthday是单数,可知要表达“第四十个生日”,用序数词fortieth;描述年龄时一般用基数词,所以是forty。故选C。【点评】考查序数词和基数词用法,注意平时识记the后面用序数词和基数词+year(s)+old。33.D【解析】句意:——老师的桌子上有多少本书 ——九十本。40本IT书和50本数学书。四个选项都是基数词:sixty六十;Seventy七十;Eighty八十;Ninety九十。根据下文“Forty IT books and fifty maths books40本IT书和50本数学书”可知共有九十,故选D。【点评】考查数学词用法,注意理解句意。34.A【解析】句意:我的车牌号是53659。读作53659。5,five,3,three,6,six,5,five,9,nine,故选A。【点评】考查基数词,注意识记基数词的表达。35.B【解析】句意:我们花了三个半小时才完成这份新的研究报告。A:three hour and a half为错误搭配;B:three and a half hours三个半小时;C:three and half hours为错误搭配。three and a half,三个半,后加复数名词hours,可知此处为时间表达法:three and a half hours=three hours and a half ,三个半小时,故选B。【点评】考查时间的表达,注意识记three and a half hours=three hours and a half的用法。36.C【解析】句意:——在这个图书馆看书是我一生中最喜欢的。——真的吗?你会感兴趣的,五分之二的书在这里是免费的。根据分数的表达,分子用基数词,分母用序数词,当分子大于1时,分母要加s,因此2/5表述为two fifths,40%表达为forty percent,因此排除A和B。根据句意,可知“读书馆里的书是免费的,这件事会让你感兴趣”,因此用this,故选C。【点评】考查代词和分数。注意识记分数的表达。37.A【解析】句意:大操场上有六千多人。thousand千;thousands数以千计的;thousand of没有这种用法;thousands of成千上万的。该题的空前面有具体的数字,因此只能用thousand。排除选项B/D。故选A。【点评】考查数学词表达,注意平时识记数字+thousand和thousands of的用法。38.A【解析】句意:我花了两个半小时制作关于如何养小猫的小册子。两个半小时的表达有两种:two and a half hours或two hours and a half,故选A。【点评】考查数词的表达,识记时间的表达方法。39.C【解析】句意:我们可以把3:45的时间读成四点差一刻。A.差一刻到三点;B.三点十五分;C.差一刻到四点;D.三点一刻。根据常识可知三点四十五的时间就是四点差一刻,故选C。【点评】考查时间的表达。注意英语中时间的表达方式。40.C【解析】句意:4加4等于8. A. six 6;B. seven 7;C. eight 8; D. nine 9。故选C。【点评】考查英语表示的数学算式。41.A【解析】句意:我们学校大约五分之三的英语老师是40岁以下。分数表达法:分子用基数词分母用序数词。五分之三的分子大于一,用基数词three;分母用序数词fifths,故选A。【点评】考查分数的表达法。注意用基数词,分母用序数的用法。42.C【解析】句意: 据报道,五分之三的学生戴眼镜。第一空根据分数作定语时,分母用序数词,分子用基数词,当分子大于一时,分母要加s,因此五分之三为 three fifths ;第二空分数作主语时,谓语动词的数由分数后的名词的数决定,此处students为复数,谓语动词用复数,即动词原形wear。故选C。【点评】考查分数2。注意熟记英语中的分数,分母用序数词,分子用基数词,当分子大于一时,分母要加s。43.C【解析】句意:我们学校有一百多名老师。他们中有五分之二是男教师。考查数字表达法和名词辨析。英语中的分数由基数词做分子,序数词做分母构成,根据句意可排除B选项。系词are后接复数名词,man男人,是单数名词,可排除A选项。故选C。【点评】考查分数表达法和名词辨析。英语中的分数由基数词做分子,序数词做分母构成,当分子大于1时分母要加s。有man、woman修饰名词时,两个名词都变成复数。44.C【解析】句意:这个男孩只有九岁,今天是他的九岁生日。nine9,基数词;ninth第九,序数词。表示几岁用主语+be+基数词,固定搭配,所以第一个用nine;表示某人几岁用one's+序数词+birthday,固定搭配,所以第二个用ninth,故选C。【点评】考查基数词和序数词,注意平时识记固定搭配表示几岁用主语+be+基数词和表示某人几岁用one's+序数词+birthday。45.A【解析】句意:—我们仅仅有三种体恤衫,你想要哪一种?—第三种,我更喜欢这个颜色。第一空描述衬衫的数量,用基数词three;第二空the+序数词+one,第几个,用third,故答案为A。【点评】此题考查基数词和序数词的用法,注意两者的区别。46.A【解析】英语中一般用基数词表示分数的分子,用序数词表示分数的分母。当分子是一时,分数的分母用单数形式,在表示分数时,当分数的分子大于一时,分数的分母要用复数形式。由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。根据分析可知选项BCD结构有误,故选A。【点评】英语分数的表达规则比较固定,学习中应牢记这些基本规则。需注意的是,由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。47.A【解析】句意:据说火星上的重力只有地球重力的3/8。分数的表达是先分子,后分母,分子用基数词,分母用序数词,当分子大于一时,分母后面加s.根据句意,故答案为A。【点评】考查分数的表达。牢记分数的表达方式。48.C【解析】英语中一般用基数词表示分数的分子,用序数词表示分数的分母。当分子是一时,分数的分母用单数形式,在表示分数时,当分数的分子大于一时,分数的分母要用复数形式。由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。选项AB结构有误,the warm water表示抽象含义,不可数,故谓语动词用单数,选C。【点评】英语分数的表达规则比较固定,学习中应牢记这些基本规则。需注意的是,由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。49.A【解析】句意:--你儿子多大了?--12岁,12月1日是他的第12岁生日。表示年龄应该用基数词;第二空后是名词,所以应该用序数词。故选A。【点评】考查年龄的表达,区别基数词和序数词的不同。50.A【解析】句意:——你好,李军!你们学校有多少学生?——大约有三千名学生。thousand千,数字+thousand,表示具体的几千;thousands of,数以千计的;选项中有three,可知后面是thousand,故选A。【点评】考查数词,注意识记thousand的用法。21世纪教育网(www.21cnjy.com) 展开更多...... 收起↑ 资源预览