人教版英语英语数词知识点(大全)含答案
数词知识点(大全)经典
数词知识点(大全)经典一、初中英语数词1．—When do you usually go to bed on school nights?—At around ________ o'clock. It's healthy to fall asleep before 10 p.m.A. nineB. ninthC. twelveD. twelfth【答案】 A【解析】【分析】句意：——上学的晚上你通常什么时候睡觉？——大约9点。
晚上10点之前睡觉是健康的。
nine九，是基数词；ninth第九，是序数词；twelve十二，是基数词；twelfth第十二，是序数词。
根据o'clock此处表示钟点，用基数词，排除BD两项。
根据It's healthy to fall asleep before 10 p.m.可知，10点之前睡觉是健康的，因此他在9点睡觉，故答案选A。
【点评】本题考查数词，注意基数词表示几点。
2．______ 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。
3．—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。
数词知识点(大全)
数词知识点(大全)一、初中英语数词1．_________ of the world's books and newspaper are written in English.A. Three quarterB. Three of quartersC. Third fourthsD. Three fourths【答案】 D【解析】【分析】句意：世界上四分之三的书报是用英语写的。
英文中分数的表示方法，分子用基数词分母用序数词，分子大于一，分母应加s。
应该是 three fourths ，故选D。
【点评】考查英文中分数的写法。
2．—How old is your daughter?— ______. We had a special party for her ______ birthday yesterday.A. Nine; nineB. Nine; ninthC. Ninth; ninthD. Ninth; nine【答案】 B【解析】【分析】句意：——你的女儿多大了？——九岁，昨天我们给她过了一个特殊的九岁的生日聚会。
第一空说明年龄，应使用基数词，第二空说明的是第几个生日，使用序数词，故答案是B。
【点评】考查数词，注意基数词和序数词的用法。
3．Please turn to Page ______________ and take a look at the picture on it.A. the eightiethB. EightiethC. EightiesD. Eighty【答案】 D【解析】【分析】句意：请翻到第80页，看看上面的图片。
当表示“第…….页（房间、组等）”时，常用“名词+基数词”，Page80表示“第80页”。
故选D。
【点评】考查基数词的基本用法。
注意Page80=the 80th page，都表示第80页。
4．Two ____________students are from Korea.A. hundreds ofB. hundredC. hundredsD. hundred of【答案】 B【解析】【分析】句意：有两百名学生来自朝鲜。
初一英语数词语法知识总结(讲解+考点+综合练习)：数 词
第四章数词一、数词概述1、数词的定义：表示数目多少或顺序先后的词为数词。
2、数词的分类：数词可分为基数词和序数词，基数词表示数量的多少，序数词表示顺序的先后。
二、数词考点纵览三、综合练习( ) 1. Lincoln was born on ________.A. February 12th, 1809B. 1809, February 12thC. 1809, 12th FebruaryD. February 1809,12th( ) 2. A _______ boy can sing the English song very well.A. ten-years-oldB. ten years oldC. ten-year-oldD. ten year old ( ) 3. An hour later, _____ minister was sent to see the “magic cloth” woven by those two men.A. twoB. the secondC. the twoD. second( ) 4. Abraham Lincoln was _______ President of the United States.A. 16B. the 16C. 16thD. the 16th( ) 5. Do you think there is any room for us ________ ?A. twoB. the twoC. secondD. the second ( ) 6. ---How many students are there in your class?---________.A. Twenty nineB. Thirty and twoC. Forty-fiveD. fifties( ) 7. Which number is wrong? _______.A. NinetyB. NinteenC. NinthD. Nineteenth ( ) 8. The People’s Liberation Army was founded _______.A. on August 1st, 1927B. in 1927, 1 AugustC. on 1st August , 1927D. in August 1, 1927( ) 9. The number 4,123 is read _______.A. four thousand one hundred and twenty-threeB. four thousand and one hundred twenty-threeC. four thousand and a hundred and twenty-threeD. four thousands a hundred and twenty-three( ) 10. The old professor still works hard though he is _________.A. in his sixtyB. in his sixtiesC. in sixtiesD. in the sixty ( ) 11. This classroom is ________ ours.A. three times big asB. as three times big asC. three times as big asD. as big three times as( ) 12. The basketball team of our school ranks ________ in the match.A. threeB. thirdC. the threeD. the third( ) 13. Which is the car that he drives? It’s ________.A. fifty twoB. the fifty-two carsC. the car fifty fourD. the fifty-fourth car( ) 14. Which of the following is wrong? ________.A. He is a fifteen-year-old boyB. He is at the age of 15C. He is a boy of 15D. He is fifteen year old( ) 15. Our school is not very big. There are only ________ students.A. nine hundreds ofB. nine hundredC. nine hundredsD. nine hundred of( ) 16. ---How many new words are there in ________ lesson?---There are only _________.A. five; fifthB. fifth; fiveC. the fifth; the fiveD. the fifth; five( ) 17. ________of the students go to school by car.A. Two threeB. Two thirdC. Second thirdsD. Two thirds ( ) 18. There was no bus in that small town. We had a ________.A. ten miles walkB. ten-mile walkC. ten mile’s walkD. tenth mile walk( ) 19. Today is the first day and ________.A. Tuesday is fourthB. Thursday is the fourthC. second is TuesdayD. a second is Thursday( ) 20. Which room do you live in? ________.A. 201 RoomB. Room 201C. Room 201stD. 201’s Room( ) 21. How many magazines do you have? I have ________.A. twoB. bothC. twiceD. the second ( ) 22. Three hundred thousand one hundred and seventy means ________.A. 3,170B. 3,117C. 300,170D. 30,170 ( ) 23. On May ________, ________ people traveled round the country.A. the first, millionsB. the first, millions ofC. first, the millionthD. first, millions( ) 24. ________ of them are dining at school.A. TwelveB. TwelfthC. The twelveD. The 12th ( ) 25. It’s 7:17 is read ________.A. seven and seventeenB. seven sevenC. seven one sevenD. seven seventeen( ) 26. Four ________ two is two.A. plusB. minusC. timesD. divided by ( ) 27. Three ________ five is eight.A. plusB. minusC. timesD. divided by ( ) 28. Three ________ seven is twenty-one.A. plusB. minusC. timesD. divided by ( ) 29. Forty-two ________ seven is six.A. plusB. minusC. timesD. divided by ( ) 30. There are ________ days in a year.A. three hundred sixty and fiveB. three hundred and sixty-fiveC. three hundreds and sixty-fiveD. three hundred sixty-five( ) 31. There are ________ students in that school.A. two thousand eight-sixB. two thousand eighty-sixC. two thousand and eighty-sixD. two thousands and eighty-six( ) 32. It took me ________ to get there.A. two hours and a halfB. two hours and halfC. two hour and a halfD. two hour and half( ) 33. September is _________ month of the year.A. the ninethB. the ninthC. ninethD. ninth ( ) 34. Please pass me _______ book on the left.A. thirdB. threeC. the thirdD. the three ( ) 35. ________ boy is very tall .A. The twelveB. The twelvethC. The twelfethD. The twelfth( ) 36. We have known each other for ________.A. a year and halfB. a year with halfC. a year and a halfD. a year with a half( ) 37. ---What year is it?---It’s ________.A. nineteen hundreds and ninety-sevenB. nineteen and ninety-sevenC. nineteen ninety and sevenD. nineteen ninety-seven( ) 38. ---What’s the date today?---It’s _________.A. TuesdayB. June FourthC. June the fourD. June the fourth ( ) 39. The train from Shanghai will arrive ________.A. in quarter past sixB. in a quarter past sixC. at quarter past sixD. at a quarter past six( ) 40. My friend was born on _________.A. three of July, 1979B. the third of July,1979C. 1979, July the thirdD. 1979, the third of July( ) 41. ________ is less than ________.A. One third; two thirdsB. One third; two thirdC. First three; first threesD. One third; one three( ) 42. Which lesson did you learn yesterday? ________.A. Lesson SevenB. Lesson seventhC. The seven LessonD. Lesson seven( ) 43. “What’s the date today?” “It’s _______.”A. fourth MayB. the fourth MayC. May fourD. May the fourth ( ) 44. 334 is read ________.A. three hundreds and thirty fourB. three hundreds thirty fourC. three hundred and thirty fourthD. three hundred and thirty-four( ) 45. In February, there are only _________ days.A. twenty nineB. twenty-ninethC. twenty-nineD. twenty eight ( ) 46. There will be a comedy on TV at ________ this evening.A. seven past thirtyB. half past sevenC. seven the thirtyD. thirty to seven ( ) 47. It took me ________ to find out the key to the drawer.A. one and half hoursB. one and a half hoursC. one and a half hourD. one and half hour( ) 48. I’m so tired after ________ walk.A. three hoursB. three hours’C. three hour’sD. three hour ( ) 49. There are ________ stars in the sky.A. million ofB. millions ofC. the millionD. a million of ( ) 50. The street is ________ wide.A. two metersB. two meterC. the two meterD. a two meter参考答案1.A2. C3. B4. D5. A6. C7. B8. A9. A 10. B 11.C 12. D 13. D 14. D 15. B 16. D 17. D 18. B 19. B20. B 21. A 22. C 23. B 24. A 25. D 26. B 27. A 28. C29. D 30. B 31. C 32. A 33. B 34. C 35. D 36. C 37. D38. D 39. D 40. B 41. A 42. A 43. D 44. D 45. C 46. B47. B 48. B 49. B 50. A文档说明(Word文档可以删除编辑)专注于精品文档：中考、高考、数学语文英语试卷、高中复习题目、小学试卷教案合同协议施工组织设计、期中、期末等测试，本文档目的是为了节省读者的工作时间，提高读者的工作效率，读者可以放心下载文档进行编辑使用.文档来源网络改编，审核有可能疏忽，如果有错误或侵权，请联系本店马上删除。
【英语】数词知识点总结(word)1
【英语】数词知识点总结（word）1一、初中英语数词1．We throw rubbish every year.A. ton ofB. tonsC. tons ofD. a ton of【答案】 C【解析】【分析】句意：我们每年扔大量的垃圾。
ton，吨，前面没有具体数字，因此用tons of，大量的，故选C。
【点评】考查固定搭配，注意平时识记。
2．When Huawei P20 came out, ______ people couldn't wait to buy one in our town.A. thousandB. thousandsC. thousand ofD. thousands of【答案】 D【解析】【分析】句意：当华为P20上市时，成千上万的人迫不及待地想在我们镇上买一台。
thousand，千，其前有具体数词修饰时，用其单数形式，当其前没有具体数词修饰时，用其复数形式，且和of连用，thousands of，成千上万，这里没有具体数词修饰，故选D。
【点评】考查整数的表达。
注意识记thousand的用法。
3．The number of the students in our school is about four __________._______ of them are girls.A. thousand; Two thirdsB. thousands; Two thirdC. thousands; Two thirdsD. thousand; Two third【答案】 A【解析】【分析】句意：我们学校的学生人数大约是四人。
三分之二是女孩。
four基数词后用thousand的原形，分数表达形式是分子是基数词，分母是序数词，分子大于一，分母用复数形式，故三分之二是two thirds，故选A。
【点评】考查数词，注意分数的用法。
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。
中考英语常用语法知识——数词知识点总结(含答案解析)
一、选择题1．__________wonderful time we had watching the birds yesterday!A．How B．How a C．What a D．What C解析：C【解析】【详解】句意：昨天我们看鸟玩得多开心啊!考查感叹句。
how和what都可用于引导感叹句：how修饰形容词或副词，what修饰名词或名词性短语。
a time指（或长或短的）一段时间，句中“wonderful time美好时光”表示单数含义，需用“what + a/an +形容词+名词+主谓”结构；根据句意结构，可知选C。
【点睛】感叹句通常有以下形式：一、How+形容词〔或副词〕+S+V…!二、What a [an] +形容词+名词+S+V…!若名词为不可数或复数的话，就不能用不定冠词。
例如：What bad weather we’re having! 多讨厌的天气!三、How+形容词+ a [an] +名词+S+V…!2．—________ fine day! We can fly kites today.—Yes, let's go.A．What a B．What C．How D．How a A解析：A【解析】【详解】句意：——多么好的天气呀！我们今天可以放风筝。
——是的，我们去吧。
考查感叹句。
英语中感叹句一般有两种结构：what +(a/an)+形容词+名词+主语+谓语！名词是复数或不可数名词，不加a/an；how+形容词/副词+主语+谓语！根据句意理解可知，这里感叹句中省略了主谓部分，且空格后面的名词是可数名词的单数形式，故用what a来修饰。
故选A。
【点睛】注意英语中感叹句的用法结构。
1. What+a/an+形容词+单数可数名词+主语+谓语!2.What+(形容词)+可数名词复数或不可数名词+主语+谓语! 3. How+形容词/ 副词+主语+谓语! 4. How+主语+谓语!做题时要根据句子结构来分析应该用哪个结构。
人教版2022年高中英语数词知识点梳理
(每日一练)人教版2022年高中英语数词知识点梳理单选题1、The dictionary is of great use to me. I would gladly have paid for it.A．twice as muchB．twice as manyC．much as twiceD．many as twice答案：A解析：考查倍数表达法。
句意：这本字典对我很重要。
我宁愿花两倍的钱来买它。
倍数表达法：倍数 as 形容词的原级as…；本题的twice就是倍数，放在最前面，much修饰钱；故A正确。
小提示：倍数表达法：倍数 as 形容词的原级as…；本题的twice就是倍数，放在最前面。
2、 He would have paid _____ for his fridge had the salesman insisted, because he really needed it.A．as much twiceB．twice as muchC．as twiceD．two times答案：B解析：考查倍数的用法。
句意：因为他很需要冰箱，他宁愿支付多于销售人员坚持的原价的两倍的价格。
倍数的固定用法 ... times（倍数）＋as＋形容词（或much）或副词原级＋as...，故选B项。
3、When you study the local map, you’ll find this town is ________.A．as twice as that oneB．twice as a large town as thatC．twice as larger as that oneD．twice as large a town as that答案：D解析：考查倍数的表达形式。
倍数的表达方式之一为：倍数+as+adj./adv.+n.，在该表达方式中，as…as之间要填形容词或副词的原级，如果之中有名词的话，其语序应为as+adj.+a +n.+as，结合选项，D选项正确。
(完整word版)数词用法
数词数词是表达数目多少或先后顺序的词。
数词分为基数词和序数词。
基数词表示人或事物的数量；序数词表示人或事物的先后顺序。
对于序数词的考查，单独出现的情况不多，有时放在阅读题中综合考察。
在学习过程中，要注意以下几个方面：1.基数词表示数量，序数词表示顺序;2.基数词与序数词之间的转换;3.数词与hundred, thousand, million等的连用。
内容导视知识点1基数词的构成知识点2序数词的构成知识点3数词的语法功能知识点4数词的其他用法知识详单知识点1 基数词的构成知识点2序数词的构成考点突破考点1 考查基数词的用法1.(龙东中考)_______fans would like to go to Brazil to watch the WorldA. Million ofB. Millions ofC. Millions【解析】选B million前面没有具体数字修饰，表示不确定的数量时，和名词连用要加of, million本身复数形式，即millions of.2.(佛山中考)Batman and Spiderman are ______of the most famous American cartoons.A. twoB. secondC. the second【解析】选A此处表示表示“……中的两个”，应该用基数词，故选A3.(贵阳中考)The winner of the singing competition was a____ girl called Zhang Mei from China.A. 19-years-oldB. l9-year-oldC. 19-year-olds.【解析】选B, 19-year-old意为“19岁的”，在句中作定语，该结构中的名词要用单数形式。
故选B4.(莆田中考)-Let's go to the bookstore at half past nine tomorrow morning.-It's too late. Let's make it_______A. a quarter to nineB. twenty to tenC. a quarter to ten【解析】选A, 第一个说话人认为“half past nine”太迟了，应该提前;第二个人应该用一个比half past nine早的时间。
人教版五年级下册英语第四单元Unit 4知识点复习及检测练习(含答案)
人教版五年级下册英语Unit 4-6知识点复习与检测练习(含答案) Unit 4 基数词与序数词复习介词in/ on/ at的复习记忆口诀：“in年in月in四季，on日on节on星期，at时刻及年龄”例如：in the year of 2023, in June, in Summeron April 1st, on Mid-Autumn Day, on Mondayat 6 p.m.，at 7 years oldUnit 4单元练习 （含答案）一、在表格中填入相应的英文数词。
（9分，9%）one two three five twelve twenty forty first二、在表格中填入相应的英语单词。
（21分，21%）一月 二月 四月 八月 九月 十月 十一月星期日 星期一 星期二 星期三 星期四 星期五 星期六三、在下方划线处填入适当的词。
（10分，10%）1. There are ________seasons ________ a year.2. Tuesday is the ________ day in a week.3. May Day is ________ May 1st.4. Andy’s birthday is __________ June 14th. 5. --________ is China’s National Day?--It’s _______ October 1st.6. I usually sleep ______ 10 p.m.7. He gets up _______six thirty every morning.8. _______ the age of seven, I began to study at this school.四、看图完成句子，一空一词。
（16分，16%）15Day 21 Summer Winter Autumn三月 AugustEnglish test Tony’s Birthday1 2 3 4 51. We will have ________ English test ________ ________ ________.2.T ony’s Birthday is _________ __________ __________.3.It’s hot ________ summer. We can ________ in the swimming pool.4.We can _________ _________ ___________ ___________ winter.5.We will go to the ___________ ___________ ___________ autumn.五、根据汉语提示，翻译下列句子。
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人教版英语英语数词知识点(大全)含答案一、初中英语数词1．—Which month of the year do you like best?— July, the _________ month, because summer vacation begin in this month.A. sevenB. sixC. seventhD. sixth【答案】 C【解析】【分析】句意：——你最喜欢一年中哪个月？——七月，第七个月。
因为在这个月暑假开始了。
A.七，基数词；B.六，基数词；C.第七，序数词；D.第六，序数词。
根据常识可知七月是一年中第七个月，所以用序数词seventh，故选C。
【点评】考查数词用法，注意平时识记，理解句意。
2．When Huawei P20 came out, ______ people couldn't wait to buy one in our town.A. thousandB. thousandsC. thousand ofD. thousands of【答案】 D【解析】【分析】句意：当华为P20上市时，成千上万的人迫不及待地想在我们镇上买一台。
thousand，千，其前有具体数词修饰时，用其单数形式，当其前没有具体数词修饰时，用其复数形式，且和of连用，thousands of，成千上万，这里没有具体数词修饰，故选D。
【点评】考查整数的表达。
注意识记thousand的用法。
3．It's never too old to learn. Karl Marx began to learn English in his ________.A. fiftiesB. fiftiethC. fiftyD. the fiftieth【答案】 A【解析】【分析】句意：活到老，学到老。
卡尔马克思在他五十多岁时开始学习英语。
in one's +整十数字的复数形式表示在某人……岁时，固定搭配，fifty，基数词，复数是fifties，所以，在他五十多岁时是in his fifties，故答案为A。
【点评】考查数词的用法及固定搭配。
在某人五十多岁时是in one's fifties。
4．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。
5．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。
6．_______, 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。
7．In 2010, ___________ people from all over the world came to Shanghai to see the World Expo.A. ten million ofB. ten millionsC. million ofD. millions of【答案】 D【解析】【分析】句意：2010年，来自世界各地的数百万人来到上海观看世博会。
表示确切数字用基数词+million，表示几百万；表示非确切数字时用millions of，数百万，固定搭配。
ten10，基数词，所以用ten million，排除A、B，故选D。
【点评】考查数学词的表达，注意平时识记表示确切数字用基数词+million，表示几百万；表示非确切数字时用millions of，数百万。
8．______ 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。
9．In the Ukraine（乌克兰）, a ________ of the population are Russia speakers.A. fiveB. fivethC. fifthD. fifty【答案】 C【解析】【分析】句意：在乌克兰，五分之一的人口是俄罗斯人。
此处考查分数的表达方法，分数词是以基数词和序数词合成的，基数词代表分子，序数词代表分母。
分子大于1时，分母需要用复数。
five五，基数词；fifth第五，序数词；fifty五十，基数词；故选C。
【点评】考查分数的表达方法。
注意英语中分数词是以基数词和序数词合成的，基数词代表分子，序数词代表分母。
分子大于1时，分母需要用复数。
10．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。
11．It's 10:15. We can say a _______ past ten.A. quarterB. halfC. poundD. kilo【答案】 A【解析】【分析】句意：现在是10:15。
我们可以说十点过一刻。
A. 一刻钟；B.一半；C.英镑；D.公斤。
根据英语的表达习惯可知，十点十五分也可以说成是十点一刻，故选A。
【点评】考查名词辨析。
注意理解单词意思，理解句意。
12．—___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。
13．Please turn to Page ______________ and take a look at the picture on it.A. the eightiethB. EightiethC. EightiesD. Eighty【答案】 D【解析】【分析】句意：请翻到第80页，看看上面的图片。
当表示“第…….页（房间、组等）”时，常用“名词+基数词”，Page80表示“第80页”。
故选D。
【点评】考查基数词的基本用法。
注意Page80=the 80th page，都表示第80页。
14．Two students to the opening ceremony last Friday.A. hundreds; were invitedB. hundred; were invitedC. hundreds of; invited【答案】 B【解析】【分析】句意：上周五有200名学生被邀请参加开幕式。
根据题干中的two与选项中的hundred可知此题考查确切数量的表达方式，hundred要用单数形式；students与invite存在动宾关系，此处要用被动语态，由last Friday，可知要用一般过去时，故选B。
【点评】考查数量的表达方式以及被动语态。
注意确切数量与不确切数量在表达上的不同。
15．My family lives on ________________ floor of the building.A. twelveB. the twelfthC. twelfthD. the twelve【答案】 B【解析】【分析】句意：我家住在这栋楼的第20层。
表示第几层，用the+序数词+floor，固定搭配，twelve，12，基数词；twelfth，第12，序数词，故选B。
【点评】考查序数词用法，注意平时识记the+序数词+floor。
16．—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。