高中英语冠词：专项复习练习及答案

这是一份高中英语冠词：专项复习练习及答案，共17页。
动词时态专项复习：冠词
第一部分:1-50 专项练习 第二部分:51-100全面解析

1．The woman who used to be in _______ charge of a big company is in _______ charge of a nurse at present.
A．the; 不填 B．the; the C．不填; 不填 D．不填; the
2．The pizzas are delicious. Little Tom would like to have ________ third piece because ________ second piece is rather too small.
A．a; a B．the; the C．a; the D．the; a
3．The manager has brought up his opinion that if they make most of the modern equipment, there will be rise in production.
A．不填; 不填 B．the; a C．不填; a D．the; 不填
4．The education of _______young is always _______ hot and serious topic in modern society.
A．the; / B．a; the C．/; the D．the; a
5．I can't tell you____ way to the Wilson's because we don't have _____Wilson here in the village.
A．a; / B．the; a C．a; the D．the; /
6．To tell you ________ truth, I went through the day with my mind in ________ fog.
A．the; / B．/; a C．a; the D．the; a
7．Unfortunately，_____ stone hit him on ______ head and he got injured.
A．the；a B．a；/ C．a；the D．the；the
8．—Where can we park car?
—Don't worry. There's sure to be parking lot nearby.
A．the; the B．the; a C．不填; a D．不填; the
9．Ted couldn't remember the exact date of the storm, but he knew it was Sunday because everybody was at church.
A．/, the B．a, / C．/, a D．the, /
10．The foreigners here are greatly impressed by the face that _______ people from all walks of life are working hard for ________ new Tianjin.
A．/; a B．/; the C．a; a D．the; the
11．Towards ___ evening after school, ___ icy rain began to fall and the road became slippery.
A．the; an B．/; an C．an; an D．an; the
12．______prize for the winner of the competition is ______two-week holiday in Paris.
A．The ; 不填 B．A ; 不填 C．A ; the D．The ; a
13．Don't take it seriously, Alice. I wasn't making _____ fun of you — it's nothing but _____ joke.
A．/; the B．the; the C．the; a D．/; a
14．Jane's grandmother had wanted to write children's book for many years, but one thing or another always got in way.
A．a;不填 B．the;the C．不填;the D．a;the
15．Brian is gifted in writing music；he is very likely to be________Beethoven.
A．a B．an C．the D．不填
16．Brian is gifted in writing music; he is very likely to be ___ Beethoven.
A．a B．an C．the D．不填
17．Jane's grandmother had wanted to write children's book for many years, but one thing or another always got in way.
A．a; 不填 B． the; the C．不填; the D．a; the
18． ______ more learned a man is, _______ more modest he usually become.
A．The ; the B．A; a
C．The ; a D．A; the
19．I just heard____ bank where Dora works was robbed by____ gunman wearing a mask.
A．the; / B． a; / C． the; a D．a; the
20．I don't know who invented ________ telephone. It's really ________ most useful invention.
A．the; a B．/; a C．a; the D．/; the
21．Dr. Peter Spence, headmaster of the school, told us, " fifth of pupils here go on to study at Oxford and Cambridge."
A．不填；A B．不填；The C．the; The D．a; A
22．Experts think that ____recently discovered painting may be _____ Picasso
A．the.不填 B．a;the C．a;不填 D．the;a
23．As is known to all, _______ opening ceremony of the 16th Asian Games held on November 12th in
Guangzhou was _______ great success.
A．/; a B．the; a C．the; / D．a; /
24．You can be ______ success, but you don't need to be ______ Bill Gates to be successful.
A．a; a B．the; / C．the; the D．/; the
25．Panama,____ country in Central America, is the only place in the world ____ someone can see the sun rise on the Pacific Ocean and set on the Atlantic.
A．the, in what B．a, where C．/, where D．a, which
26．You can have second try if you fail this time.
A．/ B．an C．the D．a
27．________ girl in red has formed the habit of walking her dog at _____ dusk every day.
A．A; / B．A; the C．The;/ D．The; a
28．________ village where I was born has grown into ________ town.
A．The; a B．A; the C．The; the D．A; a
29．Life the like ________ ocean; Only ________strong-willed can reach the other shore.
A．an; the B．the; a C．the ;/ D．/ ; a
30．They chose Tom to be ___captain of the team because they knew he was __smart leader.
A．a; the B．the; the C．the; a D．a; a
31．I can't tell you _______ way to the Wilsons' because we don't have _______ Wilson here in the village.
A．the; a B．a; / C．a; the D．the; /
32．The paper is due next month, and I am working seven days ______ week, often long into______night.
A．a; the B．the;不填 C．a; a D．不填；the
33．Animals are obviously ______ lower form of life than _______ man.
A．a ; / B．the ; the C．a ; the D．/ ; /
34．The “Chinese Dream” is ________ dream to improve people's well－being and ________ dream of harmony, peace and development.
A．the; a B．a; a C．a; the D．the; the
35．The parents were shocked by ______ news that their son needed ______ operation on his knee.
A．A; / B．the; / C．the; an D．a; an
36．It was ______ cold winter night and the moon was shining brightly across ____ night sky.
A．不填；a B．a; the C．the; a D．the; 不填
37．People develop______ preference for a particular style of learning at______ early age and these preferences affect learning.
A．a; an B．a;不填 C．不填;the D．the ;an
38．Marco Polo is said to have sailed on _______Pacific Ocean on his way to Java in ______thirteenth century.
A．the; a B．a;不填 C．不填;the D．the; the
39．The Smiths don't usually like staying at hotels, but last summer they spent a few days at a very nice hotel by ________ sea.
A．/; a B．the; the C．/; the D．the; a
40．The development of industry has been_______ gradual process throughout _______ human existence, from stone tools to modern technology.
A．不填, the B．the; a C．a; 不填 D．a; a
41．We are said to be living in ____ Information Age, ____ time of new discoveries and great changes.
A．an; the B．不填; the C．不填; a D．the; a
42．I woke up with bad headache, yet by evening the pain had gone.
A． the; the B． the; an C． a; the D． a; an
43．I make $2,000 a week, 60 surely won't make ______ difference to me.
A．that a big B．a that big C．big a that D．that big a
44．Being able to afford _______ drink would be ______ comfort in those tough times.
A．the; the B．a; a C．a; 不填 D．不填；a
45．Carl is studying food science at college and hopes to open up meat processing factory of his own one day.
A．/ ; a B．/ ；the C．the; a D．the; the
46．The student, who gave his life to save a child, was ______ honor to our school. A memorial is held here every year in ______ honor of him.
A．an; the B．an; / C．the; the D．a; /
47．Nowhere have I seen _______ beautiful valley. There are brooks, flowers and trees everywhere.
A．a more B．the more C．the most D．a most
48．They waited for _______ unexpected to happen.
A．an B．a C．the D．/
49．Don't take it seriously, Alice. I wasn't making fun of you — it's nothing but joke.
A．/; the B．the; the C．the; a D．/; a
50．________ reading of all good books is like ________ conversation with the best men of past centuries.
A．The; the B．A; a C．A; the D．The; a


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


动词时态专项复习：冠词
第一部分:1-50 专项练习 第二部分:51-100全面解析

1．The woman who used to be in _______ charge of a big company is in _______ charge of a nurse at present.
A．the; 不填 B．the; the C．不填; 不填 D．不填; the

全面分析：那个曾经负责一家大公司的女人现在由一个护士负责。介词短语in charge (of sth)“负责（某事）”；in sb's charge/ in the charge of sb，“由某人负责”，根据句意可知，第一空为“负责某事”；第二空为“由某人负责”。故选D。

2．The pizzas are delicious. Little Tom would like to have ________ third piece because ________ second piece is rather too small.
A．a; a B．the; the C．a; the D．the; a

全面分析：披萨很好吃。小汤姆想要第三块，因为第二块太小了。序数词前加a表示“又一，再一，还要一”在原有数量基础上再加一，相当于one more；序数词前加the，表示顺序，意为“第…… ”。根据句意，Tom 已经吃过两块了，还想要第三块，嫌刚吃过的第二块儿太小。故选C。

3．The manager has brought up his opinion that if they make most of the modern equipment, there will be rise in production.
A．不填; 不填 B．the; a C．不填; a D．the; 不填

全面分析：经理提出了他的意见：如果他们充分利用现代化设备，就会增产。分析可知，表示“充分利用”为固定短语make the most of，所以第一空为定冠词the；rise在此处意为“（产量的）增加”，是可数名词，且表示单数，所以用不定冠词a。故选B。

4．The education of _______young is always _______ hot and serious topic in modern society.
A．the; / B．a; the C．/; the D．the; a

全面分析：青少年教育一直是现代社会的一个热门和严肃的话题。第一空填the，the young指年轻人，第二空填a，a hot and serious topic“一个热门和严肃的问题”。选D。

5．I can't tell you____ way to the Wilson's because we don't have _____Wilson here in the village.
A．a; / B．the; a C．a; the D．the; /

全面分析：我无法告诉你去威尔逊家的路，因为我们村没有一个叫威尔逊的人。the way to...固定短语，“去......的路”，这里特指去威尔逊家的路，用定冠词the；第二空泛指一个叫威尔逊的人，应该用不定冠词，a Wilson一个叫威尔逊的人，故选B。

6．To tell you ________ truth, I went through the day with my mind in ________ fog.
A．the; / B．/; a C．a; the D．the; a

全面分析：说实话，我一整天脑子里都是糊里糊涂的。to tell you the truth固定短语，“老实告诉你、说实话”；in a fog固定短语“糊里糊涂”，故选D。

7．Unfortunately，_____ stone hit him on ______ head and he got injured.
A．the；a B．a；/ C．a；the D．the；the

全面分析：不幸的是，一块石头击中了他的头，他受伤了。a用在单数可数名词stone前表一个，hit sb on the +身体硬的部位。故选C。

8．—Where can we park car?
—Don't worry. There's sure to be parking lot nearby.
A．the; the B．the; a C．不填; a D．不填; the

全面分析：——我可以再哪里停车？——别担心，附近一定有一个停车场。第一空填the，是特指说话人的车，第二空用a，是泛指一个停车场，所以选B。

9．Ted couldn't remember the exact date of the storm, but he knew it was Sunday because everybody was at church.
A．/, the B．a, / C．/, a D．the, /

全面分析：Ted记不得风暴的具体日期了，只记得是个星期天，因为每个人都在做礼拜，第一空填a，表示不明确的一个星期天，第二空不填，at church做礼拜，故答案选B。

10．The foreigners here are greatly impressed by the face that _______ people from all walks of life are working hard for ________ new Tianjin.
A．/; a B．/; the C．a; a D．the; the

全面分析：这里的外国人对各行各业的人们为一个新天津努力工作印象深刻。people from all walks of life 是固定短语，表示“各行各业的人们”，表泛指，故用零冠词。Tian Jin被new修饰，且表示“一”的概念，用不定冠词a。故选A。


11．Towards ___ evening after school, ___ icy rain began to fall and the road became slippery.
A．the; an B．/; an C．an; an D．an; the

全面分析：临近傍晚放学后，一场冰雨从天而降，道路变得很滑。Towards evening临近傍晚，evening前不加冠词；rain指“雨水”，是不可数名词，指“一场雨”是可数名词，常常其前有形容词修饰。如：an icy rain一场冰雨，a heavy rain一场大雨。故知选B项。

12．______prize for the winner of the competition is ______two-week holiday in Paris.
A．The ; 不填 B．A ; 不填 C．A ; the D．The ; a

全面分析：考查冠词。句意：这个比赛获胜者的奖品是一个巴黎的两个星期的假期。第一空填the，是特指“获胜者的奖品”，用定冠词，第二空是泛指“一个两周的假期”，用不定冠词a。故选D。

13．Don't take it seriously, Alice. I wasn't making _____ fun of you — it's nothing but _____ joke.
A．/; the B．the; the C．the; a D．/; a

全面分析：考查冠词辨析。 句意：不要把那事当真，爱丽丝。我不是在捉弄你，这只是个玩笑。Make fun of 取笑某人，固定短语，第二个空表示泛指，故选D项
14．Jane's grandmother had wanted to write children's book for many years, but one thing or another always got in way.
A．a;不填 B．the;the C．不填;the D．a;the

全面分析：多年来，简的奶奶想写一本有关于儿童的书，但总是被这样或那样的原因阻碍了。第一个空使用不定冠词表泛指，第二个in the way 是固定搭配，意为挡道或阻碍。定冠词用于特指或者是固定搭配，不定冠词用于泛指。选D。

15．Brian is gifted in writing music；he is very likely to be________Beethoven.
A．a B．an C．the D．不填

全面分析：Brian在创作音乐上极有才华，他很有可能成为一个像贝多芬那样的人才。不定冠词在人名前，表示“一个像...…那样的人”。故选择A。

16．Brian is gifted in writing music; he is very likely to be ___ Beethoven.
A．a B．an C．the D．不填

全面分析：本题考查不定冠词在人名前，表示：一个像....那样的人，故选择A句意为：Brian在创作音乐上极有才华，他很有可能成为一个像贝多芬那样的人才。

17．Jane's grandmother had wanted to write children's book for many years, but one thing or another always got in way.
A．a; 不填 B． the; the C．不填; the D．a; the

全面分析：：句意：多年来，简的奶奶想写一本有关于儿童的书，但总是被这样或那样的原因阻碍了，第一个空使不定冠词表泛指，第二个in the way是固定搭配，意为挡道或阻碍。定冠词用于特指或者是固定搭配，不定冠词用于泛指，选D。

另外也需要注意零冠词的情况。零冠词用法归纳：独一职位在某地，用作表补同位语；独立主格作状语，用by短语表方式，man字一词指人类，对比含义两名词；系词turn+名单数，街路期刊与杂志；具体意义变抽象，as/though之倒装句；人名地名国一词，抽象物质不特指；桥名单岛单山峰，一专加一普专用词；月份星期节假日，学科语言称呼语：颜色病名五感觉，棋类球类三餐词：复数名词系泛指，固定词组惯用语；以上情况请记住，其前均用零冠词。
18． ______ more learned a man is, _______ more modest he usually become.
A．The ; the B．A; a
C．The ; a D．A; the

全面分析：一个人越有学识，他就越有可能更谦虚，使用the+比较级+主谓，the+比较级+主谓的句型，所以选A。

19．I just heard____ bank where Dora works was robbed by____ gunman wearing a mask.
A．the; / B． a; / C． the; a D．a; the
【解析】 【分析】句意：我刚刚听说朵拉工作的那家银行被一个带面具的持枪人给抢劫。第一个空表示朵拉工作的那家银行，可知表示特指，用the；第二空表示一个带面具的持枪人表示泛指，用a；

20．I don't know who invented ________ telephone. It's really ________ most useful invention.
A．the; a B．/; a C．a; the D．/; the

全面分析：这题考查冠词，第一空是表示发明物，特指，加the，第二空：a most useful是“非常有用”，这里的most相当于very。选A。
21．Dr. Peter Spence, headmaster of the school, told us, " fifth of pupils here go on to study at Oxford and Cambridge."
A．不填；A B．不填；The C．the; The D．a; A

全面分析：独一无二的头衔，职称在句子中充当同位语，零冠词；第二空为分数表达“五分之一”，a/one fifth, 基数词+序数词，故选A。句意：皮特，我们学校的校长，告诉我们：“有五分之一的学生要在牛津和剑桥深造。”
22．Experts think that ____recently discovered painting may be _____ Picasso
A．the.不填 B．a;the C．a;不填 D．the;a

全面分析：句意为：专家们认为近来发现的那部绘画作品可能是毕加索的作品。句中painting前有修饰语recently discovered，所以此处的painting是特指，故其前用定冠词the；第二个空后的Picasso本来是专有名词，指“毕加索”其人，但是在本句中，它指的是“一部毕加索的作品”，所以其前用不定冠词a，这实际上是专有名词具体化的使用。
23．As is known to all, _______ opening ceremony of the 16th Asian Games held on November 12th in
Guangzhou was _______ great success.
A．/; a B．the; a C．the; / D．a; /

全面分析：这题考查冠词的用法：第一空填the，特指16届亚运会的开幕式，第二空填a，这是success抽象名词具体化，表示“一件成功的事”，选B。
24．You can be ______ success, but you don't need to be ______ Bill Gates to be successful.
A．a; a B．the; / C．the; the D．/; the

全面分析：这题考查冠词的用法：第一空填a，success表示“一个成功的人”，第二空也是a，指“一个比尔盖茨”，选A。
25．Panama,____ country in Central America, is the only place in the world ____ someone can see the sun rise on the Pacific Ocean and set on the Atlantic.
A．the, in what B．a, where C．/, where D．a, which

全面分析：本题考查冠词与定语从句的用法。句意：巴拿马是一个美洲中部国家，也是世界上唯一一个能在大西洋看日出，太平洋看日落的国家。第一空用不定冠词a，表示泛指。第二空填where，引导定语从句，并修饰place表示地点。
26．You can have second try if you fail this time.
A．/ B．an C．the D．a

全面分析：考查冠词的用法。句意：如果你这次失败你还有一次尝试的机会。序数词前加a表示再一；又一。相当于another
27．________ girl in red has formed the habit of walking her dog at _____ dusk every day.
A．A; / B．A; the C．The;/ D．The; a

全面分析：第一空为特指,因为girl后有in red作定语限定；第二空为固定搭配，at dusk意为“在黄昏”。句意：穿红衣服的女孩养成了每天黄昏遛狗的习惯。
28．________ village where I was born has grown into ________ town.
A．The; a B．A; the C．The; the D．A; a

全面分析：我出生的那个村庄已经成了一个小镇。第一空后的名词后有where引导的定语从句，故应是特指，用the；第二空表示一个城镇，故填不定冠词a。故选A。

29．Life the like ________ ocean; Only ________strong-willed can reach the other shore.
A．an; the B．the; a C．the ;/ D．/ ; a

全面分析：生活就像一片海；只有那些意志坚强的人才能到达彼岸。ocean海洋，是可数名词，又是元音开头，所以用an；strong-willed是形容词，前面用the 表一类。又如。the injured伤员。所以选A。

30．They chose Tom to be ___captain of the team because they knew he was __smart leader.
A．a; the B．the; the C．the; a D．a; a

全面分析：句意:他们选了汤姆为这个队的队长，那是因为他们知道汤姆是个聪明的头儿。Captain后跟了个介词短语of the team作定语，表特指；后一空表类型（一个聪明的领导者），因此C选项正确。

31．I can't tell you _______ way to the Wilsons' because we don't have _______ Wilson here in the village.
A．the; a B．a; / C．a; the D．the; /

全面分析：我不能辨认去威尔逊家的路，因为本村没有叫做威尔逊的人。去威尔逊家的道路是特定的，故选择定冠词；本村没有叫做威尔逊的人。叫威尔逊的人有很多，不具有唯一性，故选择不定冠词。A项正确。

32．The paper is due next month, and I am working seven days ______ week, often long into______night.
A．a; the B．the;不填 C．a; a D．不填；the

全面分析：我的论文下个月就要交，我现在一周工作七天，还经常熬夜到深夜。第一空a表示“每一”；into the night到深夜；故选A。

33．Animals are obviously ______ lower form of life than _______ man.
A．a ; / B．the ; the C．a ; the D．/ ; /

全面分析：句意为：显然，动物是一种比人类稍低的生命形式。form (形式)，本来说抽象名词。题干中form前出现形容词修饰，因此具体化为可数名词，且表达“一种……”,所以要用不定冠词。Man ,专指人类，其前不用冠词。故选A。

34．The “Chinese Dream” is ________ dream to improve people's well－being and ________ dream of harmony, peace and development.
A．the; a B．a; a C．a; the D．the; the

全面分析：中国梦是提高人们幸福感的梦想，也是中国和谐，和平和发展的梦想。在此dream是泛指的，一个。故选B。

35．The parents were shocked by ______ news that their son needed ______ operation on his knee.
A．A; / B．the; / C．the; an D．a; an

全面分析：家长们听到他们的儿子需要在膝盖上做一个手术这个消息，很震惊。此句中的news是特指后面同位语从句中提到的内容，故应该用定冠词the；儿子需要在膝盖上做一个手术，非特指，用不定冠词a。选C。

36．It was ______ cold winter night and the moon was shining brightly across ____ night sky.
A．不填；a B．a; the C．the; a D．the; 不填

全面分析：那是一个寒冷的冬夜，月亮明亮地挂在夜空。第一空“一个寒冷的冬夜”，应用不定冠词a；第二空“夜空”，指独一无二的事物用定冠词the。故答案为B。

37．People develop______ preference for a particular style of learning at______ early age and these preferences affect learning.
A．a; an B．a;不填 C．不填;the D．the ;an

全面分析：人们在很小的时候就培养出对某种特殊的学习方式的偏好，而这样的偏好有影响了学习。第一个空选用不定冠词，a preference for sth，抽象名词具体化；第二空，固定搭配，at an early age ”在很小的时候“。选A。

38．Marco Polo is said to have sailed on _______Pacific Ocean on his way to Java in ______thirteenth century.
A．the; a B．a;不填 C．不填;the D．the; the

全面分析：据说，13 世纪时，马可·波罗在去爪哇岛的途中就已经在太平洋上航行过。第一个空海洋名称是专有名词用定冠词the，第二个空是世纪年代用定冠词the。选D。

39．The Smiths don't usually like staying at hotels, but last summer they spent a few days at a very nice hotel by ________ sea.
A．/; a B．the; the C．/; the D．the; a

全面分析：Smith一家人通常不爱呆在旅馆里，可是去年夏天他们在海边的一个很舒适的旅馆里度过几天。第一空表旅馆类别，用名词复数（零冠词）；第二空指“在海边”，属特指，用the 。故选C。


40．The development of industry has been_______ gradual process throughout _______ human existence, from stone tools to modern technology.
A．不填, the B．the; a C．a; 不填 D．a; a

全面分析：工业的发展在人类存在的历史，是从石器工具到现代技术的一个渐进过程。第一空process是可数名词，第一次出现一般用不定冠词，且此次表示“一个”的概念；第二空existence是不可数名词，其此处表示抽象概念，故用零冠词。选C。

41．We are said to be living in ____ Information Age, ____ time of new discoveries and great changes.
A．an; the B．不填; the C．不填; a D．the; a

全面分析：本题考查冠词。句意：据说我们生活在“信息时代”,一个充满新发现和富有变化的时代。第一空Information Age是普通名词构成的专有名词，前加定冠词the，构成the Information Age；第二空后的time，此处作“时代”结，是一个可数名词，a time“一个......的时代”.，用不定冠词，此处作the Information Age的同位语。故选D。

42．I woke up with bad headache, yet by evening the pain had gone.
A． the; the B． the; an C． a; the D． a; an

全面分析：我醒来头疼，但是到晚上疼痛消失了。第一空表示泛指；第二空为固定用法，用定冠词the，故选C项。

43．I make $2,000 a week, 60 surely won't make ______ difference to me.
A．that a big B．a that big C．big a that D．that big a

全面分析：本题考查形容词、副词、冠词用法。句意：我一个星期挣2,000 美元,60美元肯定不会对我有那么大的影响。that此处是副词，表示“那么”修饰形容词形容词big,其用法为：that + adj. （+ a/ an + n.），相当于so及how的用法，即that(so/ how) big a difference 故选D。

44．Being able to afford _______ drink would be ______ comfort in those tough times.
A．the; the B．a; a C．a; 不填 D．不填；a

全面分析：在那些艰难的岁月里，能买得起一杯饮料是一种莫大的安慰。此处考查抽象名词具体化。第一空中的a drink意为：一杯饮料；第二空中的a comfort意为：一件令人安慰的事。故选B。

45．Carl is studying food science at college and hopes to open up meat processing factory of his own one day.
A．/ ; a B．/ ；the C．the; a D．the; the

全面分析：卡尔在大学里面研究食品科学，希望有一天能够开一 家自己的肉制品加工厂。food science 是学科名称，不加冠词；open up a meat processing factory of his own , “开一家属于自己的肉制品加工厂”。故答案选A。

46．The student, who gave his life to save a child, was ______ honor to our school. A memorial is held here every year in ______ honor of him.
A．an; the B．an; / C．the; the D．a; /

全面分析：那个为了救一个孩子而献出生命的学生，是我们学校的光荣。这里每年都会举行追悼会纪念他。固定短语 in honor of，意为“为了纪念......”，所以第二空不用冠词。据此可排除选项A、选项C；另honor为元音开头，所以第一空要用an；表示“一个(件)引以为荣的(事/人)”。故选B。

47．Nowhere have I seen _______ beautiful valley. There are brooks, flowers and trees everywhere.
A．a more B．the more C．the most D．a most

全面分析：我没见过比这更美丽的山谷。到处都是小溪、鲜花和树木。泛指“一个美丽的山谷”，前面应用不定冠词；且此处为“否定词+比较级”相当于最高级用法，故beautiful应用比较级形式，前面加more。故选A。

48．They waited for _______ unexpected to happen.
A．an B．a C．the D．/

全面分析：他们等待着意外的事情发生。the+形容词表示一类人、一类事等，the unexpected“：意想不到的事，意外的事”，故选C。

49．Don't take it seriously, Alice. I wasn't making fun of you — it's nothing but joke.
A．/; the B．the; the C．the; a D．/; a

全面分析：不要当真，爱丽丝，我不是在取笑你，这只是一个玩笑。第一空不填，make fun of固定短语，“取笑”，第二空填a，是泛指“一个玩笑”，所以选D。

50．________ reading of all good books is like ________ conversation with the best men of past centuries.
A．The; the B．A; a C．A; the D．The; a

全面分析：阅读好书就像是与过往各个世纪优秀的人进行一次对话。分析句子可知，在第一个冠词后有of all good books，带有of结构且使用all，不宜用不定冠词a，而需用the reading（强调了博览群书这一行为本身，而非具体的哪些书）；第二处可结合句意，此处表示“进行一次对话”，首次提及，且为泛指，而非具体的某一次对话，选用a。故选D。