中考英语数词练习题
中考英语数词用法练习题30题
中考英语数词用法练习题30题1.There are ______ students in our class.A.thirtyB.thirtiethC.thirty-oneD.thirty two答案：A。
“thirty”是基数词表示三十个学生。
B 选项“thirtieth”是序数词第三十，不符合题意。
C 选项应该是“thirty-one”形式错误。
D 选项“thirty two”应写成“thirty-two”。
2.My sister is ______ years old.A.twelveB.twelfthC.the twelveD.the twelfth答案：A。
“twelve”是基数词表示十二岁。
B 选项“twelfth”是序数词第十二，不符合题意。
C 和D 选项的用法错误。
3.I have ______ books.A.fiveB.fifthC.the fiveD.the fifth答案：A。
“five”是基数词表示五本书。
B 选项“fifth”是序数词第五，不符合题意。
C 和D 选项的用法错误。
4.There are ______ days in a week.A.sevenB.seventhC.the sevenD.the seventh答案：A。
“seven”是基数词表示一周有七天。
B 选项“seventh”是序数词第七，不符合题意。
C 和D 选项的用法错误。
5.My brother has ______ pencils.A.eightB.eighthC.the eightD.the eighth答案：A。
“eight”是基数词表示八支铅笔。
B 选项“eighth”是序数词第八，不符合题意。
C 和D 选项的用法错误。
6.There are ______ months in a year.A.twelveB.twelfthC.the twelveD.the twelfth答案：A。
“twelve”是基数词表示一年有十二个月。
中考英语数词练习题
中考英语数词练习题1．—What’s four and five?—It’s ________.A．six B．seven C．eight D．nine2．The ________ month is April.A．first B．second C．third D．fourth3．Jim went shopping and spent 100 dollars on these following things yesterday. The school things cost him ________ dollars.A．5 B．10 C．154．—This is the ________ time that I come to see Paris. I have been here twice. —Me too. The world is so large that I want to see more of it.A．first B．second C．third5．—Have you heard of TFBoys?—Certainly. About ________ teenagers love them very much in our school. A．hundreds B．two hundreds of C．two hundreds D．two hundred6．In ________ Marx began to learn Russian.A．a 1870 B．the 1870 C．the 1870s D．his 18707．—Which is more exciting, the ninth act or ________?—________.A．the fiftith act; Nine Act B．the fiftith act; Act NineC．the fiftieth act; Act Nine D．the fiftieth act; Nine Act8．Twenty-two and eighteen is ________.A．four B．fourty C．forty D．fifty9．Dick, it is the ________ time in ________ days that you’ve made the same mistake.A．two; two B．second; two C．two; second D．second; second10．Several ________ people use this kind of pen all over the world every day. A．millions of B．million of C．million D．millions11．He seems to be ________, but in fact he was born in ________.A．on his fiftieth; 1990 B．in his fifties; the 1990s C．in the fifties; the 1990 D．in the fiftieth; 1990s12．Look at the numbers 2, 5, 11, 23, 47 and 95. What will be the next number? A．191 B．127 C．158 D．27613．The one-year-old boy is smart and he is able to count up to the ________ number.A．hundred B．hundredth C．hundreds D．hundreds of14．—What time is it?—It’s________（2:40）.A．forty past two B．two past forty C．twenty to three D．twenty to two15．Four and five is ________.A．six B．eight C．seven D．nine16．The boy is only ________. Today is his ________ birthday.A．five；five B．fifth；five C．five；fifth D．five；fiveth17．It’s my daughter’s birthday today. She is ________ years old.A．the eighteenth B．eighteenth C．the eighteen D．eighteen18．Women’s day is ________ March.A．on the eight of B．on the eighth of C．in the eighth of D．on the eighth19．— There are 50 students in my class. The number of the girls ________ 20. — That means two ________ of the students are girls.A．is; fifths B．are; fifths C．is; fifth20．How do you read the number 6, 425, 200 correctly?A．Six million four hundred and twenty-five thousand two hundred.B．Six millions four hundreds and twenty-five thousands two hundreds.C．Six million and four hundred and twenty-five thousand and two hundred. D．Six millions four hundred and twenty-five hundred and two hundred.21．Tomorrow is my mother’s _________ birthday.A．fortieth B．fourteen C．forty D．four22．Bob is ________ child of the family.A．five B．the five C．fifth D．the fifth23．Teacher’s Day is on ________ day of September.A．ten B．the tenth C．tenth D．tened24．―Vaccinating（注射疫苗）is a very good way to protect yourselves from COVID-19.―Yes, ________ people have tr ied it during the past months.A．thousand B．thousands C．millions of D．million25．—How do you say 8:15?—________.A．A quarter to eight B．A quarter past eight C．A quarter to nine D．Fifteen eight26．James buys 4 bags of carrots. Each bag has 16 carrots. He uses 18 carrots to make soup. How many carrots does he have now?A．2 B．38 C．46 D．8227．It’s six o’clock. The party will begin in thirty minutes.A．The party will begin at 5:30. B．The party will begin at 6:00. C．The party will begin at 6:30.28．Mary lives on the ________ floor. It’s too high, so she has to take a lift every day. A．four B．forty C．fourtieth D．fortieth29．—Look at that man. He seems to be in _________ sixties. —Yes. Perhaps he was born in _________ 1960.A．the; the B．his; the C．his, / D．/; the30．Only ________ of the e-books online ________ good for children’s study and growth, so let’s be careful about reading online.A．forty-four percent, is B．ninty percents; are C．ninety percent; are31．Father’s Day is on the ________Sunday in June. It’s on June 21st this year. A．first B．second C．third D．fourth32．— How many legs do ten cats and twenty chickens have?— ________, right?A．Fifty B．Sixty C．Eighty D．One hundred33．—What’s the ________ month of the year?—It’s March.A．three B．third C．five D．fifth34．— Ms. Li, nearly ________ of the students in our class went to see the movie last night.— Great. ________ anyone want to share your opinion on the movie?A．three quarters; Is B．three quarters; DoesC．third quarters; Is D．third quarters; Does35．May is the _________ month of the year.A．four B．fourth C．five D．fifth36．There are ________ teachers in that school.A．two hundred B．two hundreds of C．two hundred of37．More than two _________ years ago, people knew little about the universe. A．thousands B．thousand C．thousand of D．thousands of38．________our eyes, we can see more than _______ stars on a clear night. A．With; two thousand B．With; two thousandsC．In; two thousands D．In; two thousand39．Today is ________ .A．Friday, August 25th B．August 25th, FridayC．25th August, Friday D．25th Friday, August40．There are ________ minutes in an hour.A．sixty B．seventy C．sixteen D．eighty41．Jane is my best friend and she is a ______ student.A．13 year old B．13-years-old C．13-year-old42．All of us study in a building with _________ floors and our classroom is on the _________ floor.A．fifth, three B．fifth, third C．five, third D．five, three43．—How many people are at the old people’s house?— __________. Forty men and fifty women.A．Sixty B．Seventy C．Eighty D．Ninety44．I think a dog is a good pet for ________ child.A．a 6-year-old B．an 6-years-oldC．a 6-year old D．a 6 years-old45．In the ________ picture, a boy is swimming.A．one B．first C．firstly D．two46．—How do you say“1:58” in English?—________.A．Two past one B．Two to one C．Two to two D．Fifty-eight past one47．________ of the students in our class ________ going to the summer camp inBeijing next week.A．Two fifths, are B．Two fifth, are C．Two fifths, is 48．—Look! It’s _______ now. It’s time for a walk.—Yes. Let’s go out.A．a quarter past seven B．a quarter to eightC．eight to a quarter D．seven past a quarter49．The teacher was very angry because the boy made ________ mistakes in his homework.A．one B．fifth C．five50．Mike is twenty years old. Today is his ________ birthday.A．twenty B．twentieth C．twenties。
中考英语数词专项题例及练习(含答案)
中考英语数词专项题例及练习（含答案）一、中考题例( )1. _______ people come to Jilin to visit Mount Changbai every day.A. Thousands ofB. Thousand ofC. ThousandsD. Thousand ( )2. Nine _______ pounds a week? That’s very good.A. hundred ofB. hundreds ofC. hundredsD. hundred ( )3. There are _______ students in our school.A. three thousandB. three thousand ofC. three thousandsD. three thousands of( )4. We have a band in our school. _______ of the singers are from our class.They are David Brown, James Green and Lucy King.A. SixB. SixthC. ThreeD. Third( )5. The bridge is about _______ long.A. five hundred meterB. five hundreds metersC. five hundred metersD. five hundreds meter( )6. –Which is the smallest number of the four?–Yes, it’s _______ .A. two thirdsB. a quarterC. a halfD. three fifths ( )7. Look at the table. Tom wants to buy a hamburger, a large coke and an ice cream.How much will he pay?Hamburger $ 2.60 Orange Juice $1.20 Hot dog$2.15 Coffee $1.50Ice cream$2.00 Water $0.50 Popcorn $1.00 Large coke $1.00A. Three dollars and sixty centsB. Five dollars and thirty-five centsC. Five dollars and sixty centsD. Two dollars( )8. We all think that the _______ century will bring us more hopes.A. twenty-firstB. twentieth-firstC. twenty-oneD. twentieth-one( )9. Both of the two rulers are broken. I want to buy a _______ one.A. threeB. thirdC. forthD. /( )10. After the exam, we’ll have _______ holiday.A. two weeksB. two-weeksC. two weeks’D. two week’s二、单项选择( )1. _______ trees were planted on the mountain last year.A. Thousands ofB. Thousand ofC. Five thousand ofD. Five thousands( )2. My old home is about _______ from here.A. half of a mileB. half a mileC. a half of mileD. half mile ( )3. About _______ of the students in the class are boy studentsA. three-fivesB. three-fifthC. three-fifthsD. third-fifths ( )4. There are _____ children in the room. The ______ one from the left is my brother.A. fourth, fourB. four, fourthC. four, fourD. fourth, fourth( )5. September is _______ month of the year.A. nineB. ninethC. the ninthD. the nineth( )6. Please wait here, I’ll be back in _______ hours.A. two and half aB. two and a halfC. half and twoD. two a half( )7. You can find him in _______.A. Room 321B. 321 RoomC. the Room 321D. the 321 Room( )8. The _______ lesson is not so difficult as we think.A. twelfthB. twelveC. twelvethD. ten-second( )9. –When shall we leave?–We’ll leave at _______.A. a half past oneB. half past oneC. half to oneD. one past half( )10. We are going to learn _______ tomorrow.A. Lesson TenthB. Lesson TenC. Tenth LessonD. The Lesson Ten( )11. That is _______ flag, our national flag.A. five-star-redB. five-stars-redC. fifth-star-redD. five stars red( )12. _______ of the people of that town _______ colour TV sets now.A. Two-fifths , haveB. Two-fifth , hasC. Two-five , haveD. Two-fifth , have( )13. Wu Ming works hardest in the company, he is always _______ to come and_______ to leave.A. last , firstB. the last , the firstC. first , lastD. the first , the last( )14. Comrade Li learned several foreign languages in her early _______.A. twentyB. the twentiethC. twentiesD. twentieth( )15. The story Mr. Wang referred to yesterday took place _______A. in his seventyB. in the 1970sC. in the seventiesD. in 1970s ( )16. We will have a _______ holiday after the exam.A. two monthB. two-monthC. two-monthsD. two months三、参考答案(数词)中考题例1—5 A D A C C 6—10 B C A B C单项选择1—5 A B C B C 6—10 B A A B B 11—16 A A D C B B友情提示：本资料代表个人观点，如有帮助请下载，谢谢您的浏览！。
中考英语数词练习题
中考英语数词练习题一、选择题1. There are _______ students in our class.a) fifty b) fifties c) fiftieth d) fiftieths2. My sister is _______ years old.a) twelve b) twelfth c) twelves d) twelveith3. This is the _______ time I have seen him.a) second b) two c) twoth d) twice4. I have _______ pens.a) three b) threes c) third d) thirdly5. Can you lend me _______ dollars?a) five b) fifths c) fives d) fifty二、填空题1. Please write _______ copies of this document.2. She has _______ books on the shelf.3. I will be away for _______ weeks.4. There are _______ days in a year.5. He is the _______ child in their family.三、改错题1. I have two brothers and three sister.2. There are sixty students in our class.3. She gave me a thirty-five yuan bill.4. This is my seventh time to visit Beijing.5. Today is his nineteenth birthday.四、作文题请以"My Last School Trip"为题，写一篇不少于100词的短文，描述一次你们班级的学校旅行经历。
中考英语数词专项练习(附答案)
人教版中考英语九年级英语数词专项练习(附答案)一、初中英语数词1．A year is divided into ______ months. September is the _____ month of the year.A. twelve, ninthB. twelve, ninethC. twelfth, ninthD. twelfth, nineth 【答案】 A【解析】【分析】句意：一年分为十二个月。
九月是一年中的第九个月。
第一个空格后有month，月，可数名词复数monthes，其前要用基数词表示数量。
twelve十二；第二个空格前有定冠词the，空格后有可数名词month，单数，要用序数词表示顺序。
要用ninth第九。
根据故选A。
【点评】考查基数词和序数词。
注意基数词表示数量，序数词表示顺序。
2．Did you know that the earth is home to ______ animals?A. millionB. millionsC. million ofD. millions of【答案】 D【解析】【分析】句意：你知道地球是几百万动物的家园吗？millions of，固定搭配，几百万的；数词+million，表示具体的……百万，此时million是单数形式；空前没有具体数词，因此用millions of，故选D。
【点评】考查数词，注意millions of的用法。
3．The TV was invented around .A. the twenty centuryB. the twentieth centuryC. twentieth centuryD. twenty century 【答案】 B【解析】【分析】句意电视大约是在二十世纪发明的。
二十世纪也就是第二十个世纪，因此使用序数词，序数词前必须使用定冠词the，故答案是B。
【点评】考查数词，注意序数词再具体语境中的运用。
九年级英语数词练习题30题
九年级英语数词练习题30题1.There are______days in a week.A.sevenB.sixC.eightD.nine答案：A。
一周有七天，seven 表示“七”，符合实际情况。
six 是“六”，eight 是“八”，nine 是“九”，都不符合一周的天数。
2.There are______months in a year.A.elevenB.twelveC.thirteenD.fourteen答案：B。
一年有十二个月，twelve 表示“十二”。
eleven 是“十一”，thirteen 是“十三”，fourteen 是“十四”，都不符合一年的月数。
3.My sister is______years old.A.eighteenB.nineteenC.twentyD.twenty-one答案：A。
选项给出不同的年龄，根据具体情况假设姐姐十八岁比较合理。
nineteen 是“十九”，twenty 是“二十”，twenty-one 是“二十一”，都不符合设定情况。
4.There are______students in our class.A.thirtyB.fortyC.fiftyD.sixty答案：B。
班级学生数量假设为四十个，选项给出不同数量，thirty 是“三十”，fifty 是“五十”，sixty 是“六十”，根据实际情况选择forty。
5.I get up at______o'clock in the morning.A.sixB.sevenC.eightD.nine答案：B。
早上起床时间假设为七点比较合理，six 是“六点”有点早，eight 和nine 有点晚，不符合一般起床时间。
6.There are______minutes in an hour.A.thirtyB.fortyC.fiftyD.sixty答案：D。
一小时有六十分钟，sixty 表示“六十”。
(完整版)中考数词练习题
中考数词练习题(附答案)( ) 1 About _____ of the workers in the factory were born in the ____.A. two-thirds, 1970B. two-thirds, 1970sC. two-third,1970D. two-third, 1970s( ) 2. Each of us has to write a report every two weeks.A. two-hundred-wordB. two-hundreds-wordC. two-hundreds-wordsD. two-hundred-words( ) 3.Could you give me one more chance? I’ll try my best to succeed.A. twoB. the otherC. another( ) 4. ---How long will Philip stay here?---Two ______ weeks till he lives. A. many B. much C. more D. most( ) 5. Today is my mother’s ________ birthday. I will buy her a gift.A. fourteenB. fourteenthC. fortyD. fortieth( ) 6.There is a wrong word in line _________. Where?— In the ________ line.A. two; twoB. two; secondC. second; twoD. second; second( ) 7---How was your day off yesterday?---Perfect! It was ______ birthday of my g randma’s. We had a big family celebration. A. eighty B. the eightieth C. eightieth( ) 8.---There are sixty students in our class. And ______ of us are boys.---Wow! You have forty girls!A. one fourthB. one thirdC. two fifthsD. two thirds( ) 9. ---Good news! Bill won_______ medal in the long jump just now．---Really? That’s his_______ one at our sports meeting．A．a：four B．an；fourth C．a；fourth( ) 10 A new study proves a_________ walk every day is enough to keep people away from becoming fat．A．30-minute B．30 minute’s C．30-minutes( ) 11. More than two ________ years ago, people knew little about the universe. A. thousands B. thousand C. thousand of D. thousands of( ) 12 Enshi is becoming a tourist city. ____ people come here during theholidays every year.A. Thousand ofB. Thousands ofC. Five thousands ofD. Five thousands( ) 13. Father’s Day is on ______ Sunday of June.A. threeB. thirdC. the third( ) 14 --Where does John live?---He lives on ______ floor but he doesn’t use a lift to go up and down.A. nineB. the ninthC. ninthD. a ninth( ) 15. ____of the students in our class___ money to the disabled people these days.A. Two third, have raisedB. Two thirds, has raisedC. Two three, have raisedD. Two thirds, have raised( ) 16 ______ visitors come to China every year.A. Thousands ofB. Ten thousandsC. Ten thousand ofD. Thousand of17. I think ____ of the materials I listened to at the beginning of the exam ___easy. A. three fourths, is B. third four, are C. three fourths, areD. three fourth, are18. ____ trees have been planted near here, so the air is very fresh.A. Two hundredsB. Hundred ofC. Hundreds ofD. Hundreds19. I got a good present on my ____ birthday.A. nineB. ninthC. the nineD. the ninth20. The World Table Tennis Championship began the morning of May 25,2010 Moscow, Russia.A. Fifty; in; inB. Fiftieth; on; inC. Fiftieth; in; onD. Fifty; on; in21.The number of the students in our school is about nine ____. ____ of them areboys.A. hundred; Two thirdsB. hundred; Two thirdC. hundreds; Two thirdsD. hundreds; Two third22．____of the land in that district______ covered with trees and grass．A．Two fifths；is B．Two fifth；are C．Two fifth；is D．Two fifths；are23. I got a beautiful bike on ____ birthday. I like it very much.A. fifteenthB. fifteenC. my fifteenD. my fifteenth24. _____girls took part in the Happy Girl Competition but only few of them succeeded.A. Million ofB. Many million ofC. One million ofD. Millions of25. —What would you like，sir? — .A. Two popB. Two bottles popC. Two bottles of popD. Two bottle of pop26 Nearly ___ of the earth ____ covered by sea。
中考英语 数词练习题(含答案)
人教版中考英语专项训练数词练习题(含答案)一、初中英语数词1．It's the ______ time for me to visit the Shunfeng Park. And I want to visit it a sixth time.A. fifthB. fiveC. fifthsD. the five【答案】 A【解析】【分析】句意：这是我第五次参观顺丰公园，我想第六次去参观。
A序数词，第五，B基数词，五，根据the定冠词可知，定冠词后是序数词，故选A。
【点评】考查数词，注意定冠词后是序数词的用法。
2．Did you know that the earth is home to ______ animals?A. millionB. millionsC. million ofD. millions of【答案】 D【解析】【分析】句意：你知道地球是几百万动物的家园吗？millions of，固定搭配，几百万的；数词+million，表示具体的……百万，此时million是单数形式；空前没有具体数词，因此用millions of，故选D。
【点评】考查数词，注意millions of的用法。
3．______ of the students in our school are boys.A. Two threeB. Second threeC. Two thirdsD. Two third【答案】 C【解析】【分析】句意：我们学校的学生中有三分之二是男生。
分数词是分子是基数词，分母是序数词，分子大于一，分母加s，因此二分之一是two thirds，故选C。
【点评】考查分数，注意分子是基数词，分母是序数词，分子大于一，分母加s的用法。
4．—Where is Class ______?—It's on the ______ floor.A. Six; thirdB. Sixth; thirdC. Six; threeD. Sixth; three【答案】 A【解析】【分析】句意：——六班在哪里？——在六楼。
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中考英语数词练习题一、初中英语数词1．There are children in my grandfather's family and he is the child of the family. A. nine; fifth B. nine; five C. ninth; five D. ninth; fifth【答案】 A【解析】【分析】句意：我外公家有9个孩子，并且他是第五个孩子。
A.nine；fifth9；5；B.nine；five 9；5；C.ninth；five 第九；5D.ninth；fifth 第九；第五。
根据第一个空可知，此处填入基数词，答案为nine，第二个空填入序数词，答案为fifth，故选A。
【点评】考查了基数词与序数词的辨析，注意，区分两者。
2．—Where is Class ______?—It's on the ______ floor.A. Six; thirdB. Sixth; thirdC. Six; threeD. Sixth; three【答案】 A【解析】【分析】句意：——六班在哪里？——在六楼。
六班，Class Six，专有名词，六楼，the sixth floor，使用序数词，故答案是A。
【点评】考查数词的用法，注意基数词和序数词的用法区别。
3．— Is Dongjin High-speed Railway Station the largest in Hubei Province?— Yes, of course. It's just a little smaller than the largest one in Wuhan.A. firstB. secondC. thirdD. fourth【答案】 B【解析】【分析】句意：——靳东高速火车站是湖北省第二大的吗？——是的，当然。
它只是比武汉最大的稍微小一点。
A第一，B第二，C第三，D第四，the+序数词+最高级，固定搭配，第几大，根据It's just a little smaller than the largest one，可知只有一个比它大，故它是第二大的，故选B。
【点评】考查形容词最高级，注意the+序数词+最高级的用法。
4．—___is the population of China, Jack?—Let me think for a moment, it is about___.A. How many; 1,400 millionB. What; 1,400 millionC. What; 140 millionD. How many; 140 million【答案】 B【解析】【分析】句意：——中国的人口是多少，杰克？——让我想想，大约是14亿。
提问人口用what，根据常识可知，实际情况是中国有1,400 million，人口，故选B。
【点评】考查特殊疑问词，注意what提问人口的用法。
5．Nowadays, ________ people like HUAWEI phones better, and about ________ of them are adults.A. the number of; four-fifthsB. a number of; four-fifthC. a number of; four-fifthsD. the number of; four-five【答案】 C【解析】【分析】句意：现在大量的人更喜欢华为手机，并且大约他们中的五分之四是成年人。
the number of，表示......的数量；a number of，表示大量......，大量人们喜欢华为手机，因此用a number of，表泛指。
表示分数时分母用序数词，分子用基数词，分子大于1时，分母用复数，四是分子，所以用基数词four，5是分母，用序数词，分子大于一，所以用复数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，理解句意。
6．There are 24 solar terms in a year. Grain Rain often starts in April, the ________ month of the year.A. ThirdB. fourthC. fifth【答案】 B【解析】【分析】句意：一年有24个节气。
谷物雨通常在一年中的四月开始。
A：Third 第三；B：fourth第四；C：fifth第五。
空格前有定冠词the与可数名词单数month，要用序数词。
根据 Grain Rain often starts in April ，可知四月份是一年中的第四个月，要用序数词fourth，故选B。
【点评】考查序数词辨析。
根据语境和生活常识，选择正确的序数词。
7． of the students in our class _____going to the summer camp in Beijing next week.A. Two fifths, isB. Second fifths, areC. Second fifths, isD. Two fifths, are 【答案】 D【解析】【分析】句意：我们班五分之二的学生下周要去北京参加夏令营。
分数的构成分子用基数词,分母用序数词，当分子大于一时，分母用复数。
分数+of+名词作主语时，如果名词是复数，谓语动词用复数结构，故选D。
【点评】此题考查分数和主谓一致。
注意分数+of+名词作主语时,谓语动词的结构。
8．Our country is nearly years old. We'll celebrate its birthday on October 1, 2019 around the country.A. seventy, seventyB. seventy, seventiethC. seventieth, seventyD. seventieth, seventieth【答案】 B【解析】【分析】句意：我们的国家接近70岁了，我们将在2019年10月1日全国庆祝它的第七十个生日。
seventy，70，基数词；seventieth，第70，序数词。
表达几岁时用基数词+year（s）+old，表达几岁生日时用one's+序数词+birthday，故选B。
【点评】考查数词表达，注意平时识记固定搭配，理解句意。
9．It's about ________________ kilometers from Nanchong to Chengdu.A. two hundredsB. two hundreds ofC. two hundredD. two hundred of【答案】 C【解析】【分析】句意：从南昌到成都大约有两百公里。
由句意可知，这里说的是“两百公里”two是基数词表示确切的数字，不能用百、千的复数形式，“two hundred”；但当基数词表示不确切数字，百、千后就要用复数形式，如“hundreds of”，故选C。
【点评】考查基数词的用法，注意表示确切的数字时，其后不能用百、千的复数形式。
10．______ should not be allowed to go out at night.A. Twelve-years-oldB. Twelve-year-oldsC. Twelve years oldD. Twelve year olds 【答案】 B【解析】【分析】句意：12岁的孩子不应该被允许夜晚出去。
数量词作定语应用连字符，并且量词用单数，故选B。
【点评】考查数量词作定语的用法。
11．_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.A. In 1870s, in his fiftiesB. In 1870s, in fiftiesC. In the 1870s, in fiftiesD. In the 1870s, in his fifties【答案】 D【解析】【分析】句意：在十九世纪七十年代，马克思已经五十岁了，他觉得研究俄国的形势很重要，便开始学习俄语。
in the 1870s十九世纪七十年代；in one's fifties在某人五十多岁时；故选D。
【点评】考查时代的表达方式和固定短语。
掌握时代的表达方式。
12．September is the _____month of a year.A. seventhB. eighthC. ninthD. tenth【答案】 C【解析】【分析】句意：九月是一年的第九个月。
A 第七；B 第八；C 第九；D 第十。
根据句意，可知九月是一年的第九个月，故选C。
【点评】考查序数词。
理解句意，然后判断出正确的答案。
13．Two ________ students ________ to the opening ceremony last Friday.A. hundreds; were invitedB. hundred; were invitedC. hundreds of; invitedD. hundred of; invited【答案】 B【解析】【分析】句意：两百名学生被邀请参加了上周五的开幕式。
hundred和数字连用用单数，两百是two hundred，学生和邀请之间是被动关系，用被动语态，根据可知是一般过去时，所以用一般过去时的被动语态，一般过去时的被动语态是was/were+及物动词的过去分词，students是复数，用 were invited，故答案为B。
【点评】考查数词和被动语态。
注意hundred和数字连用时用单数。
14．_________ of the teachers are women in our school.A. Two thirdB. Two threesC. Two thirdsD. Two【答案】 C【解析】【分析】句意：在我们学校三分之二的老师是女老师。
表达分数时，分子用基数词，分母用序数词，分子大于1时，分母用复数。
三分二，二是分子，所以用基数词two，三是分母，所以用序数词third，分子二大于一，所以分母third用复数thirds，所以三分之二用two thirds，故选C。
【点评】考查分数表达，注意平时识记其表达规则。