(完整)初中英语数词专项练习(精选习题及答案解析)
数词习题精选 1. Which number is wrong? _______. （ ） A. Ninety B. Ninteen C. Ninth D. Nineteenth 2. -How old is your daughter? （ ） -_________. We had a special party for her _________ birthday last week. A. Ninth; ninth B. Nine; nine C. Ninth; nine D. Nine; ninth 3. There are ____ students in our school. （ ） A. four—hundred and forty—five B. four hundred and forty—five C. four hundreds and forty—five D. four hundred and forty five 4. The number 4,123 is read _______. （ ） A. four thousand one hundred and twenty-three B.four thousand and one hundred twenty-three C. four thousand and a hundred and twenty-three D. four thousands a hundred and twenty-three 5．How do you say 15,858 in English? （ ） A. Fifteen thousands, eight hundred and fifty-eight B. Fifteen thousand, eight hundreds and fifty eight. C. Fifteen thousand, eight hundred and fifty-eight D. Fifteen thousand and eight hundred and fifty-eight. 6. Tuesday is the _______ day of a week in English. （ ） A. first B. second C. third D. Fourth 7. The students went out of the room___. （ ） A. one by two B. one by one C. two by another D. one by the other 8. I've been a student there for nearly two and _______ half years. （ ） A.a B.an C.the D./ 9. --- How soon will you finish your work? --- In about _______. （ ） A. one and a half month B. one month and a half C. one and half a month D. a month and half 10. It took me ________ to find out the key to the drawer. （ ） A. one and half hours B. one and a half hours C. one and a half hour D. one and half hour 11. Do you think there is any room for us ________ ? （ ） A.two B. the two C. second D. the second 12. Which of the following is wrong? ________. （ ） A. He is a fifteen-year-old boy. B. He is at the age of 15. C. He is a boy of 15. D. He is fifteen year old. 13． —How old is Steve? （ ） —He is ____________ and he has an ___________ sister. A. 13-year-old; 10 years old B. 13 years old; 11-year-old C. 13 years old; 10-years-old D. 13-years-old; 11-years-old 14. Their house is about ___ as big as ours. （ ） A. times three B. three time C. time three D. three times 15． of the coats made of cotton. They feel comfortable. （ ） A.Two-thirds; is B. Two-thirds; are C. Two-third; is D. Two –third; are 16．--- Do you mind telling us something about this area? （ ） --- Not at all. ________ of the land in this area _________ covered with trees and grass. A. Two fifth, is B. Two fifth, are C. Two fifths, is D. Two fifths, are 17．______ of the floor _______ wet. （ ） A. Three quarter;is B. Three fourths; is C. Three fourth;are D. Three quarters;are 18．About _____ of the workers in my company ______ to work every day． （ ） A．two-nineths; drives B．two-nineths; drive C．two-ninths; drives D．two-ninths; drive 19．–Can I help you? -- Yes, I’d like _______for my twin daughters. （ ） A.two pair of shoes B. two pair of shoe C. two pairs of shoes D. two pairs of shoe 20．We don’t have enough nurses to look after the patients. At least _____ are needed. （ ） A. ten another nurses B. more ten nurses C. other ten nurses D. another ten nurses 21. At night we can see ______ stars in the sky. （ ） A. thousands and thousands of B. thousand and thousands of C. a thousand and thousands D. thousand and thousand 22． The ________ World Table Tennis Championship began ________ the morning of May 25, 2010 ________ Moscow, Russia. （ ） A．Fifty; in; in B．Fiftieth; on; in C．Fiftieth; in; on D．Fifty; on; in 23. The train from Shanghai will arrive ________. （ ） A. in quarter past six B. in a quarter past six C. at quarter past six D. at a quarter past six 24. “What's the date today?” “It's _________.” （ ） A. Tuesday B. June Fourth C. June the four D. June the fourth 25. “What year is it?” “It's ________.” （ ） A. nineteen hundred and ninety-seven B. nineteen and ninety-seven C. nineteen ninety and seven D. nineteen ninety-seven 26. The basketball team of our school ranks ________ in the match. （ ） A. three B. third C. the three D. the third 27. ________, Coca-Cola began to enter China's market. （ ） A. In 1970's B. In 1970s C. In the 1970s' D. In the 1970s 数词专项练习题（答案） 1.B 2.D 3.B 4.A 5．C【解析】试题分析：在英语中，当数次表示具体数字时，用单数形式。在读超过一百的数字时，习惯读法是在百位和十位之间用介词and相连，其它数位一次读出各级数位即可，选项ABD读法有误，故选C。 考点：英语中数字的读法 点评：英语中数词的应用有一些不同于汉语的规则，学习中应注意总结记忆。 6.C 7.B 8.A。two and a half years也可说成two years and a half，意思都是“两年半”。 9.B 10.B 11.B 12.D 13．B【解析】 试题分析：“数字-名词-形容词”的结构表示的是符合形容词，一般作定语。在这种结构中应注意两点：一是用连字符，二是名词必须用单数。而“数字+名词（复数）+形容词”的结构，一般做作表语。根据本题中的两个空的位置可知，第一个是作表语，而第二个是作定语。所以本题选B。 考点：本题考查固定用法 点评：做本题时，比较容易选错，许多学生不知什么时候用作定语，什么时候用作表语；有时有的学生还加以混用。所以对此应该准确掌握。 14.D 15．B【解析】分数表示法为：分子用基数词，分母用序数词，分子大于1, 分母加s，在分子与分母之间可加连字符也可不加连字符，所以2/3表示为two-thirds 或two thirds ；分数在句中作主语时谓语和它修饰或指代的名词保持一致。本题中two-thirds指代coats, 所以谓语用复数形式are。故选B。 考点：分数表达及主谓一致 16．C【解析】试题分析：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，分子超过一的，分母要加s，故用排除AB；根据本句的主语 the land可知，此处应该用is。所以本题选C。 考点：本题考查分数 点评：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。 17．B【解析】试题分析：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。句意：地板的四分之三都湿了。有分数修饰的名词的单复数，与被修饰的名词保持一致，floor作为地板讲时，是不可数名词。故谓语动词用单数，选B。 考点：分数表达 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。
初中英语数词专项训练100(附答案)及解析
初中英语数词专项训练100(附答案)及解析 一、初中英语数词 1．Li Hua is going to be an elder brother. His parents are planning to have their ________child. A. first B. second C. one D. two 【答案】 B 【解析】【分析】句意：李华要当哥哥了，他的父母计划生二胎。A第一，B第二，C一，D二，限定词+序数词+名词，第几个......，选项C和D是基数词，故排除，根据 Li Hua is going to be an elder brother，可知是二胎，及第二个孩子，故选B。 【点评】考查数词，注意根据 Li Hua is going to be an elder brother的语境选择序数词的用法。
2．—Where is Class ______? —It's on the ______ floor. A. Six; third B. Sixth; third C. Six; three D. 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．My family lives on ________________ floor of the building. A. twelve B. the twelfth C. twelfth D. 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。
(英语)英语数词练习题及答案及解析
（英语）英语数词练习题及答案及解析一、初中英语数词1．Ten years ago the population of our village was that of theirs.A. as twice large asB. twice as large asC. twice as much asD. as twice much as 【答案】 B【解析】【分析】句意：十年前，我们村子的人口是他们的两倍。
根据句意可知，这里考查的是表示倍数的句型，twice在这里的意思是两倍，twice as…as，表示是……的两倍，并且修饰人口众多时用形容词large或big，因此是twice as large as，故选B。
【点评】考查倍数的表达方式。
2．—Do you know the boy is sitting next to Peter？—Yes. He is Peter's friend. They are celebrating his birthday.A. who; ninthB. that; nineC. which; ninth【答案】 A【解析】【分析】句意：——你知道那个坐在彼得旁边的男孩吗?——是的。
他是彼得的朋友。
他们正在庆祝他的九岁生日。
分析句子结构可知，第一空所在句子是定语从句，先行词是人，连接词在从句中作主语，所以应该用who/that引导，which连接定语从句时先行词应该是物，故排除C；nine九，基数词；ninth第九，序数词；第二空根据空后的birthday为名词单数可知，此处需要序数词，表示某人几岁生日应该用序数词表示第几个生日，故选A。
【点评】考查定语从句的连接词的辨析和序数词。
注意区别定语从句的连接词的使用原则，理解单词词义。
3．There are ______________ months in a year. December is the ______________ month of a year.A. twelve; twelveB. twelfth; twelfthC. twelve; twelfthD. twelfth; twelve 【答案】 C【解析】【分析】句意：一年有十二个月，十二月是一年中的第十二个月。
(英语)初中英语数词题20套(带答案)含解析
（英语）初中英语数词题20套(带答案)含解析一、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．______ 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．—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。
4．—What day is the ______ day of the week?—It's Friday.A. fifthB. fiveC. sixD. sixth 【答案】 D【解析】【分析】句意：——一周的第六天是星期几？——星期五。
A.第五；B.五；C.六；D.第六。
数词练习题(含答案)1
数词练习题(含答案)1一、初中英语数词1．There are tourists visiting Beijing every year.A. hundredB. hundredsC. hundreds ofD. two hundreds of【答案】 C【解析】【分析】句意：每年有数百的游客参观北京。
表达确切数字用基数词+hundred，表达非确切数字用hundreds of，前面没有具体数字，因此用hundreds of，故选C。
【点评】考查数学词表达，注意平时识记。
2．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。
3．—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。
4．There are ______________ months in a year. December is the ______________ month of a year.A. twelve; twelveB. twelfth; twelfthC. twelve; twelfthD. twelfth; twelve 【答案】 C【解析】【分析】句意：一年有十二个月，十二月是一年中的第十二个月。
初中英语语法过关——数词专项练习 精选50题 (有答案)
初中英语语法过关——数词专项练习精选50题( ) 1. ________ letter of the word “restaurant” is “n”.A. The ninethB. NinethC. The ninthD. Ninth( ) 2. We talked for ________.A. half a hourB. half hourC. an hour halfD. half an hour( ) 3. The bus will leave at ________ this afternoon.A. three fifteenB. three and fifteenC. three quartersD. fifty to three( ) 4. The earth is ________ the size of the moon.A. 49 the timesB. 49 timesC. 49 timeD. fourty-nine times( ) 5. It’s a ________ ruler.A. two-feet-longB. two feet longC. two-foot-longD. two-foot-long( ) 6. ________ students are planting trees.A. Several hundredsB. Several hundredC. Five hundredsD. Five hundred of( ) 7. ________ to finish quickly.A. No every student wantsB. No every student wantC. Not every student wantsD. Not every student want( ) 8. ________ ago, our country was covered by thick forests.A. Several million of yearB. Several million yearC. Several million yearsD. Several million of years( ) 9. The weight of the moon is only about ________ of that of the earth.A. one eightyB. one of eightyC. one the eightiethD. one eightieth( ) 10. It’s 11:45. Yes, it’s ________.A. fifteen past twelveB. fifteen from twelveC. a quarter past eightiethD. a quarter to twelve( ) 11. W hat date is it? It’s ________.A. July twentieth-firstB. of July twenty-firstC. the twenty-first of JulyD. a quarter to twelve( ) 12. ---- ________, please? ---- It was April 15th.A. How old are youB. What was the date yesterdayC. What time was itD. What day is it today( ) 13. I have ________ things to do. I can’t play ________.A. many, no moreB. a lot of, any moreC. much, moreD. much, any more( ) 14. I have a ________ paper on my desk.A. littleB. lotC. lotsD. little of( ) 15. This is ________.A. the question thirtyB. the question thirteenC. thirty questionD. question thirteen( ) 16. ________ of the work has been done.A. Two thirdB. Two threeC. Two thirdsD. Two third( ) 17. It’s ________ now. Let’s hurry.A. half passed sixB. thirty passed sixC. half past sixD. half to seven ( ) 18. What’s the date today? It’s ________.A. the June fourthB. the fourth of JuneC. of June the fourthD. fourth June( ) 19. The old professor still works hard though he is _________.A. in his sixtyB. in his sixtiesC. in sixtiesD. in the sixty( ) 20. Do you have much work to do this weekend? Yes, I have to write a ________ paper.A. two-thousand-wordB. two-thousand-wordsC. two-thousands-wordD. two-thousands-words( ) 21. On May ________, ________ people traveled round the country.A. the first, millionsB. the first, millions ofC. first, the millionthD. first, millions( )22. 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()23.David Beckham has ________ children. Brooklyn Beckham is his ________ son.A．third; first B．three; one C．three; first D．third; one()24.It's never too old to learn.Karl Marx began to learn English in his________.A．the fiftieth B．fiftieth C．fifty D．fifties()25 With the help of the German experts, the factory produced ______ cars in 2018 as the year before.A. as twice manyB. as many twiceC. twice as manyD. twice many as()26.Tom, a ________ boy, can speak English quite well.He wants to learn________ language next term.A.twelve-years-old; second B．twelve year old; the secondC.twelve-year-old; a second D．twelve years old; the second()27.________ fans would like to go to Brazil to watch the World Cup.lion of B．Millions of C．Millions D．Two millions()28.—How far is it from Tianjin to Changsha?—It is a ________ flight from Tianjin to Changsha.A.2-hour-long B．2-hours-long C.2 hours' long D.2 hour long()29.—Which is the biggest number of the four? —________.A．One third B．Two thirds C．A half D．A quarter()30.Batman and Spiderman are ________ of the most famous American cartoons.A．two B．second C．the second D．the two()31.During the May Day holiday, we stayed in a mountain village with ________ trees around.A．thousand of B．thousand C．thousands D．thousands of()32.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; have()33.Helen loves reading.She has read ________ books this month.A．five B．fifth C．five of D．fifth of()34.It's my ________ time to come to the bookstore this month because most of the books in it are my favorite.A．forth B．four C．fourth D．the fourth( ) 35. The game of _______ Olympics will be held in Beijing in 2008.A. 29B. the 29thC. the 29D. 29th( ) 36. Most of the stars are much more bigger than the sun. But they are______ light years away from us.A. thousandB. thousandsC. thousand ofD. thousands of( ) 37. _______ of the surface(表面) of the earth is covered with water.A. First thirdB. Two thirdsC. One threeD. Two three( ) 38. There are _______ people in my family. We live on the _______ floor in a tall building.A. five, sixB. fifth, sixthC. fifth, sixD. five, sixth。
英语数词专项训练100(附答案)及解析.docx
英语数词专项训练100( 附答案 ) 及解析一、初中英语数词1．There were about six___________ students in the school building during the earthquake.A. hundredB. hundredsC. hundreds ofD. hundred of 【答案】A【解析】【分析】句意：地震期间，校舍里大约有六百名学生。
hundred ，百，基数词，表示具体的数量，其前要用基数词；hundreds of +可数名词复数，表示不确定的数量，固定短语。
空格前有基数词six，要用 hundred ，故答案选A。
【点评】考查基数词hundred 的用法。
注意hundreds 不能单独使用，必须与of 放在一起使用。
2．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。
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。
【点评】考查数词的用法，注意基数词和序数词的用法区别。
4．There are ________________ months in a year. My birthday is in the ________________ month.A. twelve; twelveB. twelfth; twelfthC. twelve; twelfthD. twelfth; twelve【答案】C【解析】【分析】句意：一年有12个月，我的生日在第12 个月。
英语数词专项训练100(附答案)及解析
英语数词专项训练100(附答案)及解析一、初中英语数词1．There were about six___________ students in the school building during the earthquake.A. hundredB. hundredsC. hundreds ofD. hundred of【答案】 A【解析】【分析】句意：地震期间，校舍里大约有六百名学生。
hundred，百，基数词，表示具体的数量，其前要用基数词；hundreds of +可数名词复数，表示不确定的数量，固定短语。
空格前有基数词six，要用hundred，故答案选A。
【点评】考查基数词hundred的用法。
注意hundreds不能单独使用，必须与of放在一起使用。
2．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。
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。
【点评】考查数词的用法，注意基数词和序数词的用法区别。
4．There are ________________ months in a year. My birthday is in the ________________ month.A. twelve; twelveB. twelfth; twelfthC. twelve; twelfthD. twelfth; twelve【答案】 C【解析】【分析】句意：一年有12个月，我的生日在第12个月。
(英语)英语数词专项习题及答案解析
（英语）英语数词专项习题及答案解析一、初中英语数词1．Last week, five ____ students took part in the sports meeting in our schoolA. thousandsB. hundredC. hundreds ofD. thousands of【答案】 B【解析】【分析】句意：上周，我们学校5百名学生参加了运动会。
根据句子前面有five，可知hundred后面不加s，hundreds of和thousands of前面不用数词修饰，故选B。
【点评】考查数词辨析，注意hundred的用法。
2．—What day is the ______ day of the week?—It's Friday.A. fifthB. fiveC. sixD. sixth【答案】 D【解析】【分析】句意：——一周的第六天是星期几？——星期五。
A.第五；B.五；C.六；D.第六。
星期五是一周的第六天，因此使用sixth，故答案是B。
【点评】考查序数词，追序数词在具体语境中的运用。
3．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。
4．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。
初中英语数词题20套(带答案)含解析
初中英语数词题20套(带答案)含解析一、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．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。
3．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。
4．There are ________________ months in a year. My birthday is in the ________________ month.A. twelve; twelveB. twelfth; twelfthC. twelve; twelfthD. twelfth; twelve【答案】 C【解析】【分析】句意：一年有12个月，我的生日在第12个月。
(英语)初中英语数词题20套(带答案)及解析
（英语）初中英语数词题20套(带答案)及解析一、初中英语数词1．The insurance company paid Mr Li two___________ dollars for his stolen vase.A. millionB. millionsC. million ofD. millions of【答案】 A【解析】【分析】句意：保险公司付给李先生两百万美元为了他被偷来的花瓶。
表示确切数字时用基数词+million表示几百万；表示非确切数字时用millions of，数百万的......。
two，2，是基数词，所以用million，故选A。
【点评】考查数学词的表达，注意平时识记确切数字时用基数词+million表示几百万；表示非确切数字时用millions of数百万的。
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．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。