2023-2024学年中考专项复习专题3：数词和主谓一致（含解析）

一、数词
命题趋势：
数词是历年各省市中考必考知识点。从考查形式看，一般有单项选择、完形填空、词语运用等。所占分值通常为2～4分。从命题意图看，侧重考查考生的具体语言环境中使用数词的能力。
中考考查重点：
1. 基数词；
2. 序数词；
3. 分数。
数词的分类：数词分为基数词和序数词。基数词表示数目的多少。序数词表示事物的先后顺序，往往与定冠词the连用。
考向一：基数词的构成
(1)0—12单独记。如： zero, one, two, three等。
(2)13—19的词尾都是teen。如：fourteen, seventeen等，但13—thirteen，15—fifteen，18—eighteen需要特殊记。
(3)20以上的整十的基数词均以ty结尾。
20—twenty，30—thirty，40—forty，50—fifty，80—eighty等。
(4)＂几十几＂要加连字符号＂-＂。
48—forty-eight, 97—ninety-seven等。
(5)＂几百几十＂或者＂几百几十几＂在＂百＂后加and。
156—one hundred and fifty-six, 509—five hundred and nine。
(6)四位数或者四位数以上的基数词的拼写规律：用逗号从右往左每三位加一个逗号，第一个逗号读作thousand(千)，第二个逗号读作million(百万)，第三个逗号读作billion(十亿)，hundred后莫忘＂and＂。
3,610＝three thousand six hundred and ten；
94,295＝ninety-four thousand two hundred and ninety-five；
考向二：序数词的构成
first 1st second 2nd third 3rd fourth 4th fifth 5th sixth 6th seventh 7th eighth 8th ninth 9th tenth 10th eleventh 11th twelfth 12th thirteenth 13th fourteenth 14th fifteenth 15th sixteenth 16th seventeenth 17th eighteenth 18th nineteenth 19th twentieth 20th twenty-first 21st twenty-second 22nd thirtieth 30th fortieth 40th fiftieth 50th sixtieth 60th seventieth 70th eightieth 80th ninetieth 90th hundredth 100th one hundred and first 101st
(1)＂第一＂、＂第二＂、＂第三＂分别是first, second, third。
(2)＂第四＂到＂第十九＂除了fifth, eighth, ninth, twelfth是特殊的拼写外，其余的都在相应基数词后面加
＂th＂构成。如：fourth。
(3)20以上的整十的序数词由相应的基数词变y为i，再加＂-eth＂。如：thirty→thirtieth; fifty→fiftieth。
(4)第一百hundredth; 第一千thousandth; 第一百万millionth。
(5)20以上的非整十的基数词变序数词时，只变化个位数。如：twenty-one→twenty-first; one hundred and one→one hundred and first。
基数词变序数词记忆口诀 基变序，有规律，词尾加上-th。 一，二，三，特殊记，词尾字母t，d，d。 八去t，九除e，ve要用f替，ty将y变成i，th前面有个e。 若是碰到几十几，前用基来后用序。 整十基数变序数，先把ty变成tie，要是遇上两位数，十位基数，个位序，th最后加上去。
考向三：分数的表达法
分数是由基数词作分子，序数词作分母构成的。除了分子是＂1＂的情况外，序数词都要用复数。
1/3 one third 7/9 seven ninths
【注意】一些特殊的分数表达法：
a half 二分之一 a quarter =one fourth 四分之一 three quarters=three fourth 四分之三
考向四：数词和主谓一致
1.就近一致原则。2.意义一致原则。3.语法一致原则。
二、主谓一致
命题趋势：
主谓一致是指谓语动词与主语在人称和数上保持一致，主谓一致必须遵循三原则：语法一致原则，意义一致原则，就近一致原则。对于主谓一致的考查，主要集中在单项选择、完形填空、汉译英及其它类型的填空题中。在学习过程中，要掌握主谓一致的基本用法及常见搭配。
中考考查重点：
主谓一致的三个原则：语法一致原则，意义一致原则，就近一致原则。
主谓一致是指谓语动词与主语在人称和数上保持一致，主谓一致必须遵循三原则：语法一致原则，意义一致原则，就近一致原则。
考向一：主谓一致的三个原则
1. 意义一致
意义一致就是根据句子主语的意义来确定谓语动词的单复数。如：
Maths is difficult for us. 数学对我们来说很难。
The police are trying to search for the thief on the hill. 警察们正在山上尽力搜查小偷。
【典例】The woman behind the girls _____________ a famous actress.
A. is B. are C. have D. has
【答案】A
2. 语法一致
语法一致即单数主语要用单数谓语动词，复数主语要用复数谓语动词。如：
My bike is under the tree. 我的自行车在树下。
These books are old. 这些书是旧的。
【典例】The Greens _____________ dinner in the kitchen now.
A. is having B. having C. are having
【答案】C
【解析】the Greens意为＂格林一家；格林夫妇＂，表复数意义，故选C。
3. 就近原则
就近原则即当主语被某些连词(短语)连接时，谓语动词的数与离它最近的词保持一致。
Either my father or brother is coming. 我父亲来，要不然就是我弟弟来。
Not only you but also they are good students. 不仅你是好学生，而且他们也是好学生。
【典例】This is my twin sister, Lucy. Not only she but also I _____________ good at drawing.
A. is B. am C. are
【知识归纳】
含义 例句
语法一致 指的是主语为单数形式时，谓语动词使用单数形式，主语如果为复数形式，那么谓语动词也使用复数形式。 Tom is a good student.汤姆是个好学生。 They often play football on the playground.他们经常在操场上踢足球。
意义一致 又称为概念一致原则，指的是谓语动词的单复数取决于主语所表达单复数意义，而不取决于表面上的语法联系。 My family are having lunch now.我们一家人现在正吃午饭。 Twenty dollars is too expensive for the book. 这本书20美元太贵了。
就近一致 又称为近邻一致原则，指的是主语由两个或两个以上的名词或代词构成，谓语动词的单复数形式应与紧邻的名词或代词保持一致。 Not only the teacher but also his students like playing football.不仅老师喜欢踢足球，而且他的学生也喜欢踢足球。 There is a pen and some books on the desk.课桌上有一支钢笔和一些书。
考向二：并列结构作主语
由and或both... and连接两个名词、代词作主语，表示不同的人或事物时，句子的谓语用复数。
John and Mike are good friends. 约翰和迈克是好朋友。
Both bread and milk are good for you. 面包和牛奶对你都有好处。
【注意】and连接的两个名词作主语，在意义上指同一人、同一物或同一概念时，谓语动词用单数。
The famous singer and dancer is coming to Chongqing. 那位著名的歌唱家兼舞蹈家要来重庆。
考向三：＂名词+介词短语＂作主语
名词或代词后接as well as，with，along with，together with，except，but等短语作主语时，谓语动词的形式应和介词短语前的名词或代词的人称和数保持一致。
She as well as other students likes playing computer games. 她和其他学生都喜欢玩电脑游戏。
He with his parents is working in the fields. 他正和他的父母在地里干活。
Nobody but you and me knows it. 除了你和我，没人知道。
考向四：不定代词作主语
1. 当作主语的名词前有each，neither，either，every修饰或each，neither，either作主语时，谓语动词用单数。
Each student has a book. 每一个学生都有一本书。
Either answer is correct. 两个答案都是正确的。
Neither parent is with him. 他的父母都没有和他在一起。
Every minute is important to us. 每一分钟对大家都很重要。
2. 当复合不定代词someone，anyone，somebody，anybody，nobody，everybody，something，anything，nothing，everything等作主语时，谓语动词用单数。
Somebody is waiting for you outside. 有人在外面等你。
Is everybody here today 今天大家都到了吗？
Something is wrong with my watch. 我的手表出故障了。
Nobody was away yesterday. 昨天没有人离开。
【典例】Now the students each _____________ an English-Chinese dictionary.
A. has B. have C. is having D. are having
【答案】B
考向五：There be和Here be的就近原则
There be和Here be 结构后面接并列名词时，谓语动词be均应与最近的名词在数上保持一致。
There is a pen，a pencil，a knife and three books on the desk. 书桌上有一支钢笔，一支铅笔，一把刀和三本书。
Here are some flowers and a card. 这里有一些花和一张卡片。
【典例】—Why are you in such a hurry, Mike
—There _____________ an NBA basketball game in ten minutes.
A. will have B. will be C. is going to have D. are going to be
【答案】B
【解析】答语为There be句型，首先排除A、C两项。又因为句中的主语为单数an NBA basketball game，由此可排除D项。
考向六：特殊名词作主语
1. 国名、人名、书名、报刊名、组织机构等专有名词作主语时，即使其形式上是复数，谓语动词也要用单数。
The United States lies to the east of China. 美国在中国的东方。(国名)
Engels was good at learning foreign languages. 恩格斯擅长学外语。(人名)
2. ＂the+形容词＂作主语时，表示某类人，谓语动词用复数。
The sick are taken good care of. 病人得到很好的照顾。
The old are supposed to be spoken to politely. 跟老人讲话要有礼貌。
3. 以-s结尾的学科名词，如maths，physics，politics等和以-s结尾的抽象名词，如news，plastics等作主语时，谓语动词要用单数。
Physics is very difficult for me to learn. 物理对我来讲很难学。
The news was very exciting. 这条新闻十分激动人心。
4. 单复数形式相同的名词，如Chinese，Japanese，sheep，deer等作主语时，谓语动词的单复数由名词前的修饰语来确定。
A Chinese wants to see you. 一个中国人想见你。
Ten sheep are eating grass there. 那边有10只绵羊在吃草。
【注意】Chinese，Japanese，English等前加the表示一国人，作主语时，谓语动词用复数。
The Chinese speak Chinese. 中国人说汉语。
【典例】Physics _____________ more interesting than maths, I think.
A. are B. is C. was D. were
【答案】B
考向七：表数量概念的词或短语作主语
1. 表示时间、金钱、距离、重量等的复数名词作主语时，通常看作一个整体，谓语动词用单数。
Ten years has passed quickly. 10年很快就过去了。
Ten dollars is enough. 10美元就够了。
100 kilometers is a long way. 100千米是一段很长的路。
2. 加减乘除运算中的谓语动词用单数，其中加法与乘法也可用复数。
Two and two is/are four. 2加2等于4。
Six times one is/are six. 6乘以1等于6。
3. ＂many a/more than one+单数名词＂作主语时，谓语动词用单数。
There is more than one answer. 有不止一个答案。
Many a student has passed the exam. 许多学生通过了考试。
4. ＂one and a half+复数名词＂作主语时，谓语用单数。
One and a half days is all I can spare. 一天半是我所能支配的全部时间。
One and a half pears is left on the plate. 一个半梨被留在盘子里。
5. the rest of... 短语作主语时，如果of后接复数名词，谓语用复数；如果of后接不可数名词，谓语用单数。
The rest of the bikes are on sale. 余下的自行车降价出售。
The rest of the bread is gone. 剩余的面包不见了。
6. ＂none of+复数名词＂作主语时，谓语动词既可以用单数也可以用复数。
None of the dogs was/were there. 那儿没有狗。
7. ＂a number of+名词复数＂表示＂许多/大量的……＂，其后的谓语动词用复数；＂the number of+名词复数＂表示＂……的数量＂，其中心词为number，故谓语动词用单数。
A number of farmers are standing over there. 许多农民站在那边。
The number of the students in this school has reached over 2，000. 这所学校的学生数量已达到2 000多人。
8. ＂a lot of/lots of/plenty of+名词＂作主语，谓语动词由of后的名词来确定。如果of后是不可数名词，谓语动词用单数；如果of后是复数名词，谓语动词用复数。
A lot of time is needed. 需要大量的时间。
Plenty of workers are working. 许多工人在工作。
【典例】—What _____________ the number of the students in your school
—About two thousand. A number of them _____________ from England.
A. is; are B. is; is 　　 C. are; is D. are; are
【答案】A
考向八：动名词、不定式和从句作主语
动名词、不定式或从句作主语时，谓语一般用单数。
Doing morning exercises is good for your body. 做早操对你的身体有益。
To play with fire near a gas station is very dangerous. 在加油站附近玩火很危险。
What he said at the meeting is very important. 他在会上的发言很重要。
【典例】To lose themselves in the net bar _____________ on teenagers’ future.
A. have a bad effect B. has a bad effect
C. have a good effect D. has a good effect
【答案】B
【辨析】
其他情况 例句
and连接并列主语时，谓语动词常常使用复数；但是and连接的并列主语指同一人、同一物时，谓语使用单数。 The writer and teacher is coming. 那位作家兼教师来了(作家和教师指同一个人) The writer and the teacher are coming. 作家和老师来了。(作家和老师是两个人)
＂单数名词或代词+名词或代词+but/besides/except/including/like/with/along with/as well as /rather than/such as/together with+名词或代词作主语，谓语使用单数形式，如果之前的名词或代词是复数，则谓语使用复数。 Mike with his father has been to England.迈克同他的父亲去过英格兰。 Mike, like his brother，enjoys playing football. 迈克像他的哥哥一样喜欢踢足球。
＂the number of+复数名词＂作主语谓语用单数; ＂a(good/large) number of+复数名词＂作主语，谓语动词用复数。 The number of the students is over eight hundred. 学生人数超过八百。 A number of teachers are present today，and the number of them is 500. 许多教师今天都出席了，有500人。
由两个相同部分组成的一个整体名词作主语，谓语动词用复数，如chopsticks，glasses，shoes，socks，stockings, trousers, boots等。若此类名词被＂a kind of/a pair of’’修饰时，谓语动词用单数。 The scissors are on the shelf next to the cupboard. 剪刀在橱柜旁边的架子上。 A pair of glasses costs quite a lot these days. 近些天，眼镜的售价很高。
当not only... but also...，not... but...，or，either... or….，neither... nor...等连接并列主语时，以及在there be句型中，谓语动词的单复数形式采用就近一致原则。 Neither Jack and I have seen this film.杰克和我都没有看过这部电影 Either you or he is to attend the meeting tomorrow.或者是你或者是他去参加明天的会议。
某些集体名词，如class, club, family, team, group等，作主语时，谓语动词采用意义一致原则，即依据名词的具体含义来确定谓语动词的单复数形式。 The company has grown rapidly in the last five years.这家公司五年来迅速发展壮大。 The family are celebrating Thanksgiving in this picture.在这张相片里，全家人正在庆祝感恩节。
【知识拓展】 如果这一类集体名词作为一个整体看待时，谓语动词使用单数形式，如果这一类词指的是具体成员，则谓语动词应该使用复数形式。
I. 用括号内单词的正确形式填空。
1. Johnny was lucky enough to win the _______ prize in the math constant. (one)
2. It’s my _______ time to win the English reading contest this year. (two)
3. Lesson _______ is the most difficult lesson in this English text book. (eleventh)
4. China has become the _______ country to send her astronauts into space. (three)
5. Mrs. Brown is going to buy a present to her songs _______ birthday. (twelve)
6. Shanghai is _______ of the largest cities in the world. ( first)
7. Most of the drinking water ______________ (be) from the Black River.
8. Either you or he ______________ (have) made a wrong decision.
9. The police ______________ (be) trying to catch the thief.
10. The number of the teachers in the school ______________ (be) 120.
II. 单项选择。
1. ______________ of the students in our class have lunch at school.
A. Two fifth B. Threes fifths
C. One thirds D. Three quarters
2. Mother’s Day is on the ______________ Sunday in May every year.
A. two B. second C. six D. sixth
3. ______________ is more interesting than ______________
A. Lesson One；Lesson Two B. The first lesson；second lesson
C. First lesson；the second lesson D. First Lesson；Second Lesson
4. Not only I but also Jack and Mary ______________ tired of the examinations.
A. is B. are C. am D. be
5. —How many teachers are there in your school
—About 200. One third of them ______________ men teachers.
A. have B. has C. are D. is
1.My father gave me a bike on my ______________ birthday.
A. ten B. a tenth C. the tenth D. tenth
2.—English is becoming a popular tourist destination now.
—I think so. ______________ people come here every summer vacation.
A. Hundreds and thousands of　 B. Hundred and thousand of C. Hundreds and thousands
3.Li Ming will be ______________. His parents are going to have a party for ______________ birthday.
A. sixteen; sixteenth B. sixteenth; sixteenth
C. sixteen; sixteen D. sixteenth; sixteen
4.The environment here becomes better and better. ______________ birds are coming back.
A. Thousands of B. Thousand of
C. Thousands D. Thousand
5. —A recent survey shows that 35 0ut of 45 students in my class will save their phones first in a fire.
—About ______________ of the students made such a choice Life is far more important, isn’t it
A. half B. one third
C. two thirds D. three quarters
6. —Jack, ______________ of the oranges ______________ gone bad.
—We’d better eat up the rest as soon as possible.
A. one fifth；have　 B. one fifth；has
C. one fifths；have D. first five；has
7. Andy, with his parents, ______________ to Hong Kong, and they will stay there for a week.
A. have gone B. has gone　
C. have been 　 D. has been
8. My sister with my parents ______________ dumplings when I got home yesterday evening.
A. are making　　 B. is making　　　　
C. was making D. were making
I. 单项选择。
1. It is reported that people throw ______________ plastic bags along this street every day.
A. three hundreds of B. three hundreds
C. hundreds of D. hundred of
2. President Xi Jinping, together with his wife Peng Liyuan, visited USA from April 6 to 7. This is his ______________ visit to America.
A. eight B. the eight C. eighth D. the eighth
3. —______________ do you read English newspaper
—At least ______________ a week.
A. How long；one B. How often；twice
C. How many；once D. How much；third
4. —How do your students improve their English writing
—Well, about ______________ of the students like keeping diaries in English in our class.
A. two fifth B. two fifths
C. second five D. two five
5. —Hi, Kate! There are ______________ floors in this building. Which floor do you live on
—I live on the ______________ floor.
A. twenty；twelve B. twenty；twelfth
C. twentieth；twelfth D. twentieth；twelve
6. —How old is your sister
—______________.We had a special party for her ______________ birthday yesterday.
A. Twenty-one；twenty-first B. Twenty-first；twenty-first
C. Twenty-one；twenty-one D. Twenty-first；twenty-one
7. —How much ______________ the pair of shoes
—Twenty dollars ______________ enough.
A. is; is B. is; are C. are; is D. are; are
8. A number of boys ______________ singing songs. The number of boys ______________ getting larger and larger.
A. are; is B. is; are C. is; is D. are; are
9. Wu Dajing did a great deal of practice before the Winter Olympics in 2018 so that he won a gold medal.
A. many B. hundreds C. a large amount of D. a large number of
10. ______________ of the city ______________ covered with parks and gardens, oh, it’s really a green city.
A. Three fifth; is B. Three fifths; is C. Three fifth; are D. Three fifths; are
11. ______________ of the students ______________ in the classroom. They are doing homework.
A. two three; is B. two thirds; are C. two third; are D. second third; is
12. ______________ should be allowed to choose their clothes.
A. Ten-year-olds B. Ten-year-old C. Ten-years-olds D. Ten-years-old
II. 用括号内单词的正确形式填空。
1. Not only you but also I (be) wrong.
2. Neither Bill nor his parents (be) at home now.
3. The football team (be) having a shower now.
4. Nothing in the world (be) difficult for one who is careful.
5. Ten thousand pounds (be) a lot of money.
6. When each person (come) in, they must show their tickets.
7. Fifty miles (be) not a great distance.
8. Nobody but John and Jim (be) asked to go.
9. None of us (have) got a camera.
10. Vegetables sold at this shop (be) usually cheap.
11. A large number of boys and girls (play) in the park every day.
12. The old in my country (be) cared for by their children and grandchildren.
13. There (be) a pair of trousers on the sofa.
14. Every man, woman and child (know) something about the hero.
15. The police (be) looking for the thief now.
16. Nobody (want) to spend time on such a thing.
17. The Great Wall as well as the Palace Museum (attract) lots of tourists from abroad every year.
18. Three-fourths of the surface of the earth (be) covered by water.
19. John, together with his family, (be) flying to London next week.
20. Few of my family really (understand) me.
跟踪训练
I. 用括号内单词的正确形式填空。
1. first 2. second 3. Eleven 4. third 5. twelfth
6. one 7. is 8. has 9. are 10. is
II. 单项选择。
2. B 【解析】句意：母亲节在每年五月份的第二个星期天。two二；second第二；six六；sixth第六。根据句意可知，这里应该用序数词，表示＂第……个＂，并且母亲节是五月份的第二个周日。故选B。
3. A 【解析】句意：第一课比第二课更有趣。Lesson one第一课；Lesson Two第二课；the first lesson第一课；the second lesson第二课。根据句意可知应选A。序数词前应加定冠词the，因此其他选项都不对。
4. B 【解析】句意：不仅我而且杰克和玛丽都厌倦了考试。not only ... but also等连接并列主语时，谓语动词的单复数形式采用就近一致原则。故选B。
5. C 句意：——你们学校有多少个老师？——大约200。其中三分之一为男老师。分数在句子中作主语时，谓语动词的单复数形式取决于分数后面的名词是单数还是复数。故这里要用are。
真题再现
1. D 【解析】句意：我的父亲在我十岁生日时给了我一辆自行车。one’s the +序数词+birthday，表示某人多少岁生日。当序数词前有物主代词时，冠词the要省略。ten对应的序数词是tenth，故选D。
2. A 【解析】句意：——恩施现在正成为一个受欢迎的旅游目的地。——我认为是这样，每年暑假都有成千上万的人来这里度假。hundred和thousand前面没有具体数词时，需要与of连用，且表示不具体、不准确的数目时，词尾须加-s。故选A。
3. D 【解析】句意：——根据最近的一份调查显示，我们班四十五个同学中有三十五个在火灾发生时，首先要救出他们的手机。——大约四分之三的学生做出了那种选择？生命更重要得多，是不是？A. half半，一半；B. one third三分之一；C. two thirds三分之二；D. three quarters四分之三。35÷45=0.777与四分之三接近。
4. A 【解析】句意：这里的环境变得越来越好，数以千计的鸟都飞回来了。这里thousand前没有数词时，后用介词of，thousand用其复数形式，表示的是模糊数字。故选A。
5. A 【解析】句意：李明马上要16岁了。他的父母要为他的十六岁生日开一个晚会。前句表示十六岁，表示数量，用基数词sixteen；后句表示第十六个生日，表示顺序，用序数词sixteenth。故选A。
6. A 【解析】分数中，分子用基数词，分母用序数词(分子大于1时加-s)，分数作主语时，谓语动词与后面的名词保持一致。oranges是复数。故选A。
8. C 【解析】句意：我昨晚回家时，我妹妹和我父母在包饺子。A项表示现在进行时；B项的主语应为单数，表示现在进行时；C项的主语为单数，表示过去进行时；D项表示过去进行时。由主语My sister为第三人称单数和时间状语为yesterday evening可知用过去进行时。故选C。
模拟检测
I. 单项选择。
1. C 【解析】句意：据报道每天人们扔在这条大街上的塑料袋有好几百个。hundred与数词连用时不加s，但是表示好几百时，用复数形式，与介词of连用。故答案选C。
2. C 【解析】句意：习近平主席携夫人彭丽媛从4月6日到7日访美。这是他第八次访美。此处修饰单数名词visit，故用序数词，有形容词性物主代词his修饰，故eighth前不加定冠词the，故选C。
3. B 【解析】句意：——你多久读一次英语报纸？——至少一周两次。How long提问for+一段时间；How often提问频度；How many提问可数名词的复数；How much提问不可数名词，根据题意，故选B。
4. B 【解析】句意：——你的学生怎样提高他们的英语写作水平的？——噢，在我们班大约五分之二的学生喜欢用英语写日记。本题考查分数的表达。英语分数由基数词和序数词组成。基数词作分子，序数词作分母，当分子大于1时，分母用复数。故选B。
5. B 【解析】句意：——你好，凯特，这栋楼房有二十层，你住在哪一层？——我住在第十二层。前句表示楼房有二十层，二十，表示数量，用基数词twenty；后句表示住在第十二层，第十二，表示顺序，用序数词twelfth。故选B。
6. A 【解析】句意：——你妹妹多大了？——21岁，我们昨天为她的第二十一个生日开了一个特别的派对。表示年龄时使用基数词的形式，在多少岁生日前用序数词，故答案为A。
7. A 【解析】句意：——这双鞋多少钱？——二十美元足够。the pair of短语作主语，谓语动词要用第三人称单数形式；twenty dollars表示钱，作主语时谓语动词也用第三人称单数形式。故选A。
8. A 【解析】句意：许多男孩正在唱歌。男孩的数量越来越大。A number of boys许多男孩，中心词是boys，用作主语时，谓语动词要用复数形式；The number of boys男孩的数量，中心词是number，用作主语时，谓语动词要用第三人称单数形式，故选A。
10. B【解析】句意：这个城市的五分之三被覆盖着公园和花园，哦，它真的是一个绿色的城市。第一个空考查的是分数的表达方法，分子应用基数词，分母用序数词，当分子大于一的时候，分母用复数，故A和C形式不对，先排除。第二个空考查的是主谓一致，这句话的主语中心词是the city，是单数，故动词也用单数，选B。
11. B【解析】考查分数及主谓一致。句意：2/3的学生都在教室里，他们正在做作业。分数的表达方式是，先写分子后写分母，分子用基数词，分母用序数词，分子大于分母加s；当分数加of加名词做主语时，谓语动词的单复数根据名词的单复数来决定。故选B。
12. A【解析】考查名词的用法。句意：应该允许十岁的孩子选择自己的衣服。Ten-year-olds十岁大的孩子，表示一类人。结合句意，故选A。
II. 用括号内单词的正确形式填空。
1. am/was 2. are 3. are 4. is 5. is
6. comes 7. is 8. is/was 9. has/have 10. are
11. play 12. are 13. is 14. knows 15. are
16. wants/wanted 17. attracts 18. is 19. is 20. understand