初中九年级英语下册：主谓一致专项强化练习及答案

这是一份初中九年级英语下册：主谓一致专项强化练习及答案，共17页。
初三英语下册：主谓一致
第一部分:1-50 专项练习 第二部分:51-100全面解析

1．— Dad, of the apples gone bad.
— Well, we'd better eat up the rest as soon as possible.
A．two-third; have B．two-thirds; have
C．two- thirds, has D．two-third, has
2．The singer and dancer, as well as the audience, _______ moved by the drama at that moment.
A．were B．was C．is D．are
3．Not only you but also I _________ able to help him out.
A．are B．is C．am D．were
4．There ______ a great number of students over there. The number of the students ______more than two thousand.
A．is, are B．are, is C．are, are D．is, is
5．Ms. Tang who is my sister's English teacher, as well as her students ______ every morning.
A．run B．runs C．ran D．are running
6．Mum says that she ________ Beijing twice.
A．have been to B．have gone to C．has gone to D．has been to
7．—What kind of movies do you like?
—I like movies scary monsters.
A．which has B．that have C．what has D．why have
8．Jane along with her friends_______ Ice Age: Collision Course tomorrow afternoon.
A．has watched B．have watched
C．are going to watch D．is going to watch
9．Andy has __________for five years. Five years _______ a long time.
A．left home, is B．been away from home, is
C．left home, are D．been away from home, are
10．There are many trees ________ side of the road and ________ of the trees is growing larger and larger．
A．on both; the number B．on each; a number
C．on each; the number D．on every; the number
11．________ Lily ________ Lucy may go with you because one of them must stay at home．
A．Not only; but also B．Both; or
C．Both; and D．Either; or
12．—What are you going to do this weekend?
—I together with my classmates _______ going to climb Mount Qian.
A．is B．am C．are D．were
13．Neither I nor my brother ________ playing computer games, and we all study hard all the time.
A．like B．likes C．doesn't like
14．— We have something important to do. Can we leave now?
— Sorry. Neither you nor your brother ________ to leave.
A．needs B．need C．needed
15．Every boy and every girl ________ a new book two days ago.
A．was given B．were given C．have given
16．The police _________ searching a man with a beard now.
A．has B．is C．are D．were
17．Either the twins or Betty the city of New York well．You can ask them for advice．
A．know B．knows C．like D．have known
18．Climbing hills of great help to our health. Let's go climbing.
A．was B．were C．is D．are
19．In our school library there a number of books on science and the number of them growing larger and larger．
A．is，are B．are, is C．has，is D．have，are
20．One of the girls a watch like this.
A．have B．has C．there are D．there is
21．________ are crazy about listening to pop music in their spare time.
A．Bill as well as Dick and Lucy
B．Neither Victor nor Tom
C．Not only Tim but also the twins
D．Either Anita or Jack
22．It's said that ______ of the water around the world ______ polluted.
A．two third; is B．two third; are
C．two thirds; is D．two thirds; are
23．The number of the volunteers in our city 2,000. And sixty percent of them teachers and students.
A．is; is B．is; are C．are; is D．are; are
24．Neither Li Hua nor I good at writing.
A．am B．is C．are D．be
25．—What ______ the number of students in your school?
—About two thousand. A number of them _____ from the countryside.
A．is, are B．is, is C．are, is D．are, are
26．All the students _______ very hard over the last three years.
A．works B．has worked C．have worked D．worked
27．Neither of the two students _______ the teacher who is much too strict.
A．like B．likes C．liking D．liked
28．Mr. Smith and Mrs. Smith's life _________ happiness.
A．is full of B．are full of C．is fill with D．are fill with
29．So far Tom with Mary _______ 50 left -behind children to do their homework after school.
A．help B．helped C．has helped D．have helped
30．Look, the Maths teacher with his students _________on the grass to have a good rest at present.
A．is lying B．is lieing C．are lying D．be lying
31．______ of that country _______ by snow.
A．Second thirds; is covered B．Two thirds; is covered
C．Two thirds; are covered D．Two third; covers
32．On Women's Day, of the girls was excited because they each a present.
A．every one; was given B．everyone; was given
C．every one; were given D．everyone; were given
33．Neither I nor he ______ compared the prices of the PC, so ______ he ______ I decided to know more before buying it.
解析中:由这类并列连词连接的两个并列主语，其谓语动词与后一个主语保持一致。我觉得讲解有误，因为 both...and...后其谓语动词要用复数形式。题目中考的是Neither...nor...可以改为:Neither...nor...后谓语 动词与后一个主语保持一致 (知识性错误)
A．has; both; and B．have; not only; but also
C．hasn't; either; or D．haven't; neither; nor
34．______ students have more spare time for their hobbies now.
A．A number of B．The number of C．A member of D．Members of
35．The woman teacher together with her students_________going there_______.
A．are;by foot B．is;on foot C．are;by feet D．is;on feet
36．The number of students in our school _________ more than 2000.
A．is B．are C．has been D．was
37．Everybody except the two young boys _______ shocked by the bad news. People looked at each other in ________.
A．was, silence B．were, silence C．was, silent D．were, silent
38．Not only I but also Tom and Jim ____ the film.
A．like B．likes C．liking D．to like
39．—There _________ a very popular TV show this Friday.
—I know that show. It's called “I Am A Singer”.
A．will have B．will hold
C．is going to have D．is going to be
40．—Which would you prefer, orange juice or coffee?
—Either ________ OK, but I prefer coffee ________ milk.
A．are; with B．is; with C．are; to D．is; to
41．A number of students ______ playing on the ground but I don't know what the exact number______.
A．are; is B．are; are C．is; is D．is; are
42．There ______ a park near here. Shall we take a walk?
A．be B．were C．is D．are
43．_______ of the materials I listened to at the beginning of the exam _______ easy.
A．Three fourths; is B．Third four; are
C．Three fourths; are D．Three fourth; are
44．We think _______ more vegetables _______ good for our health.
A．eating, are B．eating, is C．eatting, are D．eatting, is
45．There _____a sports meeting in our school next week.
A．will hold B．will have
C．is going to be D．is going to hold
46．Mr.Smith, together with his two sons,_____Shanghai for about five months.
A．has left B．has been away from
C．have left D．have been away from
47．The important sports festival, the Olympic Games, held
every years.
A．is, five B．are, three C．is, four D．are；two
48．—There _________a big earthquake in Japan this March.
—Yeah. Many Chinese volunteers went there to help the people in trouble.
A．was B．is C．were
49．Not only Jam but also his parents _______ a few interesting places since they came to China.
A．will visit B．has visited C．have visited D．visited
50．There are millions of websites on the Internet and there _______ a lot of useful _________on the websites.
A．are；informations B．are；information
C．is；information D．is；informations


答案解析部分
1．B
2．B
3．C
4．B
5．B
6．D
7．B
8．D
9．B
10．C
11．D
12．B
13．B
14．A
15．A
16．C
17．B
18．C
19．B
20．B
21．C
22．C
23．B
24．A
25．A
26．C
27．B
28．A
29．C
30．A
31．B
32．C
33．A
34．A
35．B
36．A
37．A
38．A
39．D
40．B
41．A
42．C
43．C
44．B
45．C
46．B
47．C
48．A
49．C
50．C


初三英语下册：主谓一致
第一部分:1-50 专项练习 第二部分:51-100全面解析

1．— Dad, of the apples gone bad.
— Well, we'd better eat up the rest as soon as possible.
A．two-third; have B．two-thirds; have
C．two- thirds, has D．two-third, has
全面分析：——爸爸，苹果有三分之二已经坏了。——我们最好快点吃掉其余的。 分数的表达：分子为基数词；分母为序数词。分子大于一的分母用复数；故排除A和D；分数修饰名词做主语时，谓语动词与后面的名词的数保持一致；apples是可数名词复数，故用动词原形。故选B。

2．The singer and dancer, as well as the audience, _______ moved by the drama at that moment.
A．were B．was C．is D．are
全面分析：这位歌手兼舞蹈家和观众被那时的剧情所感动。as well as在句中连接两个主语时谓语动词应与前面的主语 The singer and dancer 保持一致，应用单数，排除AD；根据 at that moment，那时，应用一般过去时态，故选B。

3．Not only you but also I _________ able to help him out.
A．are B．is C．am D．were
全面分析：不仅你而且我能帮助他一把。英语中，not only ......but also在句中连接两个主语时，谓语动词应与就近的主语保持一致。应用am，故选C。

4．There ______ a great number of students over there. The number of the students ______more than two thousand.
A．is, are B．are, is C．are, are D．is, is
全面分析：有许多学生在那边。学生的数量超过两千。根据 a great number of+可数名词的复数，在句中做主语谓语动词一般现在时用复数； the number of+可数名词的复数，在句中做主语谓语动词用单数。故选B。

5．Ms. Tang who is my sister's English teacher, as well as her students ______ every morning.
A．run B．runs C．ran D．are running
全面分析：唐小姐是我的姐姐的英语老师，每天早上和她的学生一样跑步。根据as well as是就远原则，可知谓语动词用三单，填入runs，结合短语every morning，可知用一般现在时，故选B。

6．Mum says that she ________ Beijing twice.
A．have been to B．have gone to C．has gone to D．has been to
全面分析：妈妈说她去过北京两次。have been to+地点，表示去过某地，主语是she，单数第三人称，因此用has been to，故选D。

7．—What kind of movies do you like?
—I like movies scary monsters.
A．which has B．that have C．what has D．why have
全面分析：——你喜欢哪种电影？——我喜欢有恐怖怪物的电影。句子中的先行词是the movies为复数形式，谓语动词用have；先行词指物，关系词在定语从句中主语，用that。故选B。

8．Jane along with her friends_______ Ice Age: Collision Course tomorrow afternoon.
A．has watched B．have watched
C．are going to watch D．is going to watch
全面分析：简和她的朋友准备明天下午一起去看冰川时代:星际碰撞。along with 与…一道；随同…一起;使用的是就远原则，连接主语是谓语动词与前面的主语保持一致。本句的主语是Jane，所以谓语应该用单数。根据时间状语tomorrow afternoon可知 本句是将来时，be going to 计划，打算做.....表示将来。故答案为D。

9．Andy has __________for five years. Five years _______ a long time.
A．left home, is B．been away from home, is
C．left home, are D．been away from home, are
全面分析：安迪离开家已经五年了，五年是挺长的一段时间。短暂性动词不能与一段时间连用，必须转换为状态性动词，leave/go转换为be away；five years是一段时间，排除A、C；当时间、金钱、距离等作主语时，常看作单数，谓语用is。故选B。

10．There are many trees ________ side of the road and ________ of the trees is growing larger and larger．
A．on both; the number B．on each; a number
C．on each; the number D．on every; the number
全面分析：路的两边有许多树，树的数目越来越大。both两者都，后接复数名词；each每个，后接单数名词，指两个或两个以上的人或事物中的“每个”；every每一个，用于指三个以上的人或事物的“全体”。a number of 许多，修饰复数名词，谓语动词为复数；the number of……的数量，强调the number，谓语动词为单数。路有两边，根据句意语境，可知，故选C。

11．________ Lily ________ Lucy may go with you because one of them must stay at home．
A．Not only; but also B．Both; or
C．Both; and D．Either; or
全面分析：莉莉或者露西中的一个可以和你一起去，因为其中一个必须待在家里。not only ... but also，either... or，neither... nor连接名词或代词作主语时，谓语的数与最近的那个主语一致，即“就近原则”。both ... and连接主语时，谓语用复数。根据句意可知，是“两者之一”的意思。A表示“两者都”；B搭配不当；C“两者都”；D“或者......，或者......”。故选D。

12．—What are you going to do this weekend?
—I together with my classmates _______ going to climb Mount Qian.
A．is B．am C．are D．were
全面分析：——这个周末你打算做什么?——我和我的同学一起去爬钱山。这句话主语是I，together with my classmates 只是伴随状语，不是主语．主语I是第一人称单数，应该用am，故答案为B。

13．Neither I nor my brother ________ playing computer games, and we all study hard all the time.
A．like B．likes C．doesn't like
全面分析：我哥哥和我都不喜欢玩电脑游戏，我们都一直很努力学习。neither……nor用就近一致原则，谓语与最近的名词保持一致，本句中立like最近的是my brother，所以用单数第三人称，故答案为B。

14．— We have something important to do. Can we leave now?
— Sorry. Neither you nor your brother ________ to leave.
A．needs B．need C．needed
全面分析：—我们有重要的事要做，我们现在可以离开了吗？—对不起，你和你兄弟都不必离开。neither……nor用就近一致的原则，谓语动词与最近的名词保持一致，本题中need与your brother保持一致，所以用第三人称单数形式，故答案为A。

15．Every boy and every girl ________ a new book two days ago.
A．was given B．were given C．have given
全面分析：两天前每个男孩和每个女孩都被给了一本新书。was given一般过去时的被动语态，主语为单数；were given也是一般过去时态的被动语态，主语为复数；have given是现在完成时，主动形式。根据句意，这句话的主语every boy and every girl与谓语动词give构成被动关系，故应使用被动语态，C排除。一般来说and连接的并列名词做主语时，谓语动词应用复数形式，但是当名词前有every, no等来修饰的时候，谓语动词用单数。故应选A。

16．The police _________ searching a man with a beard now.
A．has B．is C．are D．were
全面分析：警察现在正在搜查一个长胡子的男人。has有，是have的第三人称单数形式；is是，用于主语是单数的时候；are是，用于主语是复数的时候；were是are的过去式。根据句意和句中的now可知，这句话应使用现在进行时态。主语the police是集合名词，谓语动词应用复数形式，故选C。
17．Either the twins or Betty the city of New York well．You can ask them for advice．
A．know B．knows C．like D．have known
全面分析：要么这对双胞胎要么Betty对纽约市很了解，你可以向他们征求建议。either……or……遵循就近一致的原则，谓语动词与离它最近的主语保持一致。句中离谓语最近的是Betty，所以谓语用单数，故选B。

18．Climbing hills of great help to our health. Let's go climbing.
A．was B．were C．is D．are
全面分析：爬山对我们的健康很有帮助，我们去爬山吧。动名词作主语，谓语用单数。根据Let's可知用一般现在时，故选C。

19．In our school library there a number of books on science and the number of them growing larger and larger．
A．is，are B．are, is C．has，is D．have，are
全面分析：在我们图书馆有一些关于科学的书，它们的数量正变得越来越大。a number of谓语用复数；the number of谓语用单数。故选B。

20．One of the girls a watch like this.
A．have B．has C．there are D．there is
全面分析：其中一个女孩有一块像这样的手表。One of the girls是第三人称单数，故选B。

21．________ are crazy about listening to pop music in their spare time.
A．Bill as well as Dick and Lucy
B．Neither Victor nor Tom
C．Not only Tim but also the twins
D．Either Anita or Jack
全面分析：不仅Tim 而且这对双胞胎在他们闲暇时间对听流行音乐着迷。本题考查not only....but also...表示不仅而且，谓语动词跟两个主语；Neither ...nor...表示两者都不，Either...or ...表示或者……或者……，两者的谓语动词都是依据就近一致原则；as well as也，还有，连接两个主语，谓语动词跟前一个主语保持一致，结合句子，谓语动词为are，而ABD都是单数，故选C。

22．It's said that ______ of the water around the world ______ polluted.
A．two third; is B．two third; are
C．two thirds; is D．two thirds; are
全面分析：据说世界上三分之二的水被污染了。two thirds”三分之二“，分子用基数词，分母用序数词，分子大于一的时候，分母要加s，因此A和B两个选项分数的构成不对，先排除。这个分数修饰了后面的名词water，是不可数名词，故谓语动词用单数，选C。

23．The number of the volunteers in our city 2,000. And sixty percent of them teachers and students.
A．is; is B．is; are C．are; is D．are; are
全面分析：the number of……，作主语时，谓语动词用单数；sixty percent of……“百分之六十……”，当其修饰的名词在句子中作主语时，谓语动同用单数还是复数取决于名词，即与名词保持一致．因为of后跟代词them．所以答案为B。

24．Neither Li Hua nor I good at writing.
A．am B．is C．are D．be
全面分析：由neither……nor……连接两个词作主语，谓语动词应与最近的主语保持一致，即遵循“就近原则”，故选A。句意是：我和李华都不擅长写作。

25．—What ______ the number of students in your school?
—About two thousand. A number of them _____ from the countryside.
A．is, are B．is, is C．are, is D．are, are
全面分析：你们学校学生数是多少？——大约2000人。他们中大多数来自农村。上文主语the number of students表示单数含义，故be动词用单数，下文A number of表示许多，主语them是复数，故be动词用复数，答案选A。

26．All the students _______ very hard over the last three years.
A．works B．has worked C．have worked D．worked
全面分析：Over the last three years, 用于现在完成时，又由于主语是复数，故选C。

27．Neither of the two students _______ the teacher who is much too strict.
A．like B．likes C．liking D．liked
全面分析：neither做主语，谓语动词用单数。故选B。

28．Mr. Smith and Mrs. Smith's life _________ happiness.
A．is full of B．are full of C．is fill with D．are fill with
全面分析：史密斯先生和夫人的生活充满了幸福。生活不可数，谓语应用单数。而C答案fill后未加ed,.故选A。

29．So far Tom with Mary _______ 50 left -behind children to do their homework after school.
A．help B．helped C．has helped D．have helped
全面分析：此题要掌握现在完成时的时间状语及主语+with 短语是单数的概念，即可得出答案。选C。
30．Look, the Maths teacher with his students _________on the grass to have a good rest at present.
A．is lying B．is lieing C．are lying D．be lying
全面分析：看，这个数学老师正在和他的学生躺在草地上休息。with连接两个主语时，重点强调前者，谓语动词的数与第一个名词的数保持一致，本题中数学老师是主语，故用单数形式，lie表示“躺着”，现在分词的形式是lying,故选A

31．______ of that country _______ by snow.
A．Second thirds; is covered B．Two thirds; is covered
C．Two thirds; are covered D．Two third; covers
全面分析：这个国家的三分之二被雪所覆盖。在英语中分子用基数词表达，分母用序数词表达如果分子大于1，分母变复数。分数作主语时，根据其后接的词而定，如果为不可数名词或名词的单数，则相当于单数，如果其后接的为可数名词复数形式，则相当于复数，故选B

32．On Women's Day, of the girls was excited because they each a present.
A．every one; was given B．everyone; was given
C．every one; were given D．everyone; were given
全面分析：在妇女节那天女孩们都很兴奋因为她们每人得到一份礼物。everyone与every one的区别：everyone只用来指人，等于everybody，在它后面不能跟介词of；every one既可用来指人，也可用来指物，等于each one，后面可跟介词of。2.every one表示“人人、每个人”讲时，它也等同于everyone。They是复数代词，所以动词be的过去式用were。故选C。

33．Neither I nor he ______ compared the prices of the PC, so ______ he ______ I decided to know more before buying it.
解析中:由这类并列连词连接的两个并列主语，其谓语动词与后一个主语保持一致。我觉得讲解有误，因为 both...and...后其谓语动词要用复数形式。题目中考的是Neither...nor...可以改为:Neither...nor...后谓语 动词与后一个主语保持一致 (知识性错误)
A．has; both; and B．have; not only; but also
C．hasn't; either; or D．haven't; neither; nor
全面分析：不仅我而且他也比较了这台电脑的价格，因此我和他都决定在买之前多了解一下。Both……and……，……和……都；not only……but also……不但……而且……；either……or……，或者……或者……；neither……nor……，既不……也不。根据句意可知应选用Neither…… nor……， 而Neither…… nor……后谓语动词要与后一个主语保持一致，he表示单数第三人称含义，故谓语动词用单数，选A。
34．______ students have more spare time for their hobbies now.
A．A number of B．The number of C．A member of D．Members of
全面分析：a number of一些，许多；the number of……的数目。句意：现在许多学生都有多余的时间来进行他们的个人爱好。结合语境可知前文主语为复数形式，故系动词用复数。下文主语number表示抽象含义，故谓语动词用单数，选A。

35．The woman teacher together with her students_________going there_______.
A．are;by foot B．is;on foot C．are;by feet D．is;on feet
全面分析：这位女老师，还有他的学生们打算步行去那儿。本句中together with her students为伴随主语，真正主语是The woman teacher，故谓语动词用单数。步行是on foot，故选B。

36．The number of students in our school _________ more than 2000.
A．is B．are C．has been D．was
全面分析：a number of一些，许多；the number of……的数目。句意：我们学校学生的数目已经超过了2000。结合语境可知本句中number的含义是数目，表示抽象含义，故谓语动词用单数，选A。

37．Everybody except the two young boys _______ shocked by the bad news. People looked at each other in ________.
A．was, silence B．were, silence C．was, silent D．were, silent
全面分析：除了这两个男孩外,每个人都被这个坏消息震惊了.人们沉默的看着彼此.everybody做主语谓语动词用单数形式,下文in是介词,后面接名词作宾语,结合语境可知选A.

38．Not only I but also Tom and Jim ____ the film.
A．like B．likes C．liking D．to like
全面分析：不仅我，而且汤姆和吉姆也喜欢这部电影。由not only……but also连接的两个并列主语，谓语动词与后一个主语保持一致，本句中Tom and Jim表示复数含义，故选A。

39．—There _________ a very popular TV show this Friday.
—I know that show. It's called “I Am A Singer”.
A．will have B．will hold
C．is going to have D．is going to be
全面分析：There be句型表示“某地(或某时)存在有某人(或某物)，而并非某地(某人、某物或某时)拥有什么东西”，句中有若干个名词作主语，动词be常与后面主语中的第一个名词在数上一致。have一般表示某人有某物。Will表示将来自然发生的动作，be going to表示计划打算发生的动作。句意：这个周五有一个非常受欢迎的电视节目。——我知道那个节目。叫做“我是歌手”结合语境可知上文描述的是将来计划打算发生的动作，故选Ｄ。

40．—Which would you prefer, orange juice or coffee?
—Either ________ OK, but I prefer coffee ________ milk.
A．are; with B．is; with C．are; to D．is; to
全面分析：你更喜欢哪一个，橘子汁还是咖啡？——任何一种都不错，但是我更喜欢加奶的咖啡。Either做主语，谓语动词用单数，prefer A to B,相比于……B更喜欢A，with表示带有，伴随的意思。结合语境可知选B。

41．A number of students ______ playing on the ground but I don't know what the exact number______.
A．are; is B．are; are C．is; is D．is; are
全面分析： a number of一些，许多；the number of……的数目。句意：许多学生正在操场上玩，但是我不知道确切的数目是多少。结合语境可知前文主语为复数形式，故系动词用复数。下文主语number表示抽象含义，故谓语动词用单数，选A。

42．There ______ a park near here. Shall we take a walk?
A．be B．were C．is D．are
全面分析：There be句型表示“某地(或某时)存在有某人(或某物)，而并非某地(某人、某物或某时)拥有什么东西”，句中有若干个名词作主语，动词be常与后面主语中的第一个名词在数上一致。have一般表示某人有某物。句意：这儿附近有一个公园。我们去散步好吗？结合语境可知本句描述的是客观性动作，故用一般现在时态。主语a park是单数形式，故谓语动词用单数，选C。

43．_______ of the materials I listened to at the beginning of the exam _______ easy.
A．Three fourths; is B．Third four; are
C．Three fourths; are D．Three fourth; are
全面分析：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。

44．We think _______ more vegetables _______ good for our health.
A．eating, are B．eating, is C．eatting, are D．eatting, is
全面分析：我们认为吃更多的蔬菜对我们的健康有好处。动名词作宾语表示抽象动作，不可数，故谓语动词用单数，选Ｂ。

45．There _____a sports meeting in our school next week.
A．will hold B．will have
C．is going to be D．is going to hold
全面分析：下周我们学校将举行一场运动会。next week下周，故用一般将来时态，there be 句型将来时为there will be="there" is going to be,故选C

46．Mr.Smith, together with his two sons,_____Shanghai for about five months.
A．has left B．has been away from
C．have left D．have been away from
全面分析：史密斯先生连同他的两个儿子已经去上海五个月了。和一段时间连用，要用延续性的动作或状态。leave 对应的延续性的状态是be away, with his two sons,介词短语，不做主语，主语是Mr.Smith，第三人称单数，故助动词用has，故选B。

47．The important sports festival, the Olympic Games, held
every years.
A．is, five B．are, three C．is, four D．are；two
全面分析：每四年举行一次的奥运会是非常重要的体育节日。根据语境，句子用一般现在时，the Olympic Games作为主语，谓语动词用is，every four years="every" other three years每四年，即每隔三年，故选C

48．—There _________a big earthquake in Japan this March.
—Yeah. Many Chinese volunteers went there to help the people in trouble.
A．was B．is C．were
全面分析：There be句型表示“某地(或某时)存在有某人(或某物)，句意:这个三月在日本又一次大地震.结合语境可知上文描述的是过去发生的动作,故用过去时态.主语a big earthquake表达抽象含义,不可数,故谓语动词用单数,选A.

49．Not only Jam but also his parents _______ a few interesting places since they came to China.
A．will visit B．has visited C．have visited D．visited
全面分析： 句意：自从他们来到中国以来，詹姆和他的父母参观了几个有趣的地方。结合语境可知本句描述的是现在已经完成的动作，故用现在完成时态。由Not only……but also连接的两个并列主语，谓语动词与后一个主语保持一致。his parents是复数形式，故谓语动词用复数，选C。

50．There are millions of websites on the Internet and there _______ a lot of useful _________on the websites.
A．are；informations B．are；information
C．is；information D．is；informations
全面分析：There be句型表示“某地(或某时)存在有某人(或某物)，而并非某地(某人、某物或某时)拥有什么东西”，句中有若干个名词作主语，动词be常与后面主语中的第一个名词在数上一致。句意：网上有无数的网站，并且在这些网站上有许多有用的信息。Information在英语中是不可数名词，故不加s，谓语动词用单数，选C。