高中英语常考题：非限制性定语从句专项复习

这是一份高中英语常考题：非限制性定语从句专项复习，共19页。
高中英语专题：非限制性定语从句
第一部分:1-50 专项练习 第二部分:51-100全面解析

1．He made another wonderful discovery, ______ of great importance to science.
A．which I think is B．which I think it is
C．which I think it D．I think is
2．Bella, who is always cheerful, creates a friendly work atmosphere in her office every day, ____ her colleagues find pleasant and relaxing.
A．where B．which C．when D．that
3．The factory produces half a million pairs of shoes every year, ________ 80% are sold abroad.
A．which of B．of which C．of them D．of that
4．_______ we all know, books are the source of knowledge.
A．What B．That C．Which D．As
5．His promise___________ he would give away half of the year's income to the disabled turned out a lie, _________ made the public feel cheated.
A．which; what B．that; which C．what; which D．which; that
6．The commercial city, Loulan, used to be a stopping point on the silk road between the West and the East, ______ by sandstorms from AD200 to AD 400.
A．which is believed to be covered over
B．as is believed to have been covered over
C．it is believed to be covered over
D．which is believed to have been covered over
7．Soon after getting off his horse, the captain appeared at the second-floor windows, ______ he could see nothing but trees.
A．where B．from where C．which D．from which
8．_______ is often the case with children, Amy was better when the doctor arrived.
A．It B．That C．What D．As
9．______ is known to all, good friends ______ happiness and value to life.
A．As; add to B．It; add C．What; add to D．As; add
10．She has many good friends,_________ are really kind to her and her parents.
A．most of them B．and most of whom
C．but most of whom D．most of whom
11．Lifting weights is good for teenagers, ____some experts say will help them become energetic.
A．which B．what C．why D．whom
12．Below the mountains, the sunshine reflects on the many lakes, ____makes them shine like diamonds against the rich countryside.
A．as B．that C．which D．what
13．I would rather my brother were in beijing, in _______case he would accompany me to the bookstore.
A．that B．what C．which D．whose
14．I often stay up late into the night, _________ leads to my sleeping in class.
A．that B．which C．it D．what
15．_____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful.
A．That; what B．What; which C．It; which D．As; that
16．The problem with traffic crowdedness in the city put forward at the meeting, the government takes into consideration, is of great importance.
A．what B．where C．which D．as
17．The last line added was Jubilee Line, was opened in honor of the 25th anniversary of Elizabeth _____the queen.
A．which; becoming B．where; becoming
C．which; to have become D．where; to have become
18．The first trials of Aspirin took place in 1899, ____ the company Hoffmann worked for ___distributing the medicine in powder form to physicians to use with patients.
A．when; began B．which; beginning
C．when; beginning D．which; began
19．People can unlock the shared bikes, _________are equipped with GPS and can be left anywhere in public, by simply _________their smart phones.
A．which; use B．which; using
C．of which; use D．of which; using
20．Yesterday, I went back to my primary school, ________ my teachers and I talked about our good old days.
A．which B．that C．when D．where
21．China's first self-designed modem bridge reopened to road traffic, we Chinese were so proud when it was built 50 years ago.
A．to which B．for which C．in which D．of which
22．The old pictures bring the Greens to the days they spent together, life was hard but happy.
A．which; when B．which; whose C．when; whose D．when; which
23．A lot of measures have been taken recently, of benefits, however, some are difficult to see in the short term.
A．what B．whose C．which D．whom
24．Only those, as Albert Einstein once said in one of his famous books, ______ attempt the absurd can achieve the impossible.
A．who B．which C．whose D．where
25．Many people, some of ______ are not overweight at all, are always going on diets or taking weight-loss pills, _____ are often dangerous.
A．who, that B．whom, that C．who, which D．whom, which
26．—Thank you for your assistance, without ___I might have been in danger.
—That's all right, anyone in my place ________ the same thing.
A．that; will do B．it, would
C．which; can have done D．which; would have done
27．Kae, _________sister I shared a room with when we were at college, has gone to work in Australia.
A．whom B．that C．whose D．her
28．We will put off the picnic in the park until next week, ____ the weather may be better.
A．that B．where C．which D．when
29．She and her family bicycle to work, _________ helps them keep fit.
A．which B．who C．as D．that
30．Helen managed to go to university by borrowing money from the bank, ______ turned out to be a wise decision.
A．what B．where C．which D．it
31．Blog discussions may be closed to new comments, ____a message is displayed informing you of that.
A．in what case B．in that case C．in whose case D．in which case
32．The general at last got a chance to visit the village ________ he used to fight, ________ he had been dreaming of for years.
A．that; which B．where; that
C．in which; what D．where; which
33．The Alibaba Group, __________ was founded in 1999, has become China's largest e-commerce company.
A．which B．what C．whose D．where
34．Nowadays teenagers like to go to fast food restaurants, __________, as the name suggests, eating doesn't take much time.
A．which B．who C．where D．that
35．It rains a lot these days， _______ prevents us from going out.
A．it B．that C．this D．which
36．He is a man with rich experience, from ______ much can be learned.
A．whom B．which C．where D．what
37．Since the establishment of the 5th Nanyang Municipal Committee of CPPCC, 2,988 proposals have been received, 2,695 have been put on file.
A．of which B．whose C．in which D．with which
38．The mountain, name means “flowers and fruits”, attracts millions of tourists every year thanks to its mythical status and beautiful scenery.
A．which B．whose C．where D．in which
39．In particular, we associate ancient Greek civilization with the capital city of Athens, _________ is the Acropolis.
A．the greatest symbol of which B．of which greatest symbol
C．whose the greatest symbol D．of whose greatest symbol
40．If an excellent Chinese novel is translated into English, ____ means many more people in the world can enjoy it.
A．as B．which C．what D．that
41．She and her family bicycle to work, _________ helps them keep fit.
A．which B．who C．as D．that
42．Kae, _________sister I shared a room with when we were at college, has gone to work in Australia.
A．whom B．that C．whose D．her
43．Smoking, ________________ is a bad habit, is, however, popular.
A．that B．which C．it D．though
44．Barbary was working in a company, __________ she went daily by bus.
A．which B．it C．that D．where
45．This is the last factory he used to work at, many workers of .still have a good relationship with him.
A．/; it B．which; whom C．/; which D．which; that
46．After graduating from college，I took some time off to go travelling，______ turned out to be a wise decision.
A．that B．which C．when D．where
47．The whole class applauded wildly at the end of the speech, __________ greatly encouraged Bob.
A．what B．where C．which D．when
48．People can unlock the shared bikes, are equipped with GPS and can be left anywhere in public, by simply their smart phones.
A．which; use B．which; using
C．of which; use D．of which; using
49．Teachers are those who use themselves as bridges, over they invite their students to cross．
A．them B．which C．whom D．those
50．John invited about 40 people to his wedding, most of ____________ are family members.
A．them B．that C．which D．whom



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


高中英语专题：非限制性定语从句
第一部分:1-50 专项练习 第二部分:51-100全面解析

1．He made another wonderful discovery, ______ of great importance to science.
A．which I think is B．which I think it is
C．which I think it D．I think is

全面分析：他又有一次重大发现，我认为这对科学很重要。分析句子结构可知，逗号后面为which引导的非限制性定语从句，which在从句中做主语。应用which is……。句中I think为插入语，分析句子成分时可以先忽略插入语，故答案为A。

2．Bella, who is always cheerful, creates a friendly work atmosphere in her office every day, ____ her colleagues find pleasant and relaxing.
A．where B．which C．when D．that

全面分析：贝拉总是很开朗，每天在她的办公室里营造了友好的工作氛围，她的同事们觉得这样的氛围轻松愉快。句中先行词为atmosphere，在非限定性定语从句中作动词find的宾语，所以用关系代词which引导。故选B。

3．The factory produces half a million pairs of shoes every year, ________ 80% are sold abroad.
A．which of B．of which C．of them D．of that

全面分析：工厂每年生产50万双鞋，其中80％都销往海外。“分数+ of+ which”表示部分与整体的关系，引导非限制性定语从句，可知选B。

4．_______ we all know, books are the source of knowledge.
A．What B．That C．Which D．As

全面分析：众所周知，书本是知识的源泉。as we all know固定句式，"众所周知"，故选D。

5．His promise___________ he would give away half of the year's income to the disabled turned out a lie, _________ made the public feel cheated.
A．which; what B．that; which C．what; which D．which; that

全面分析：他要把一年一半的收入捐给残疾人的诺言结果证明是一个谎言，这让公众感觉被欺骗了。第一空是一个同位语从句，that he would give away half of the year's income to the disabled对前面的名词promise的内容进行的解释说明，that在句中不充当任何成分，只起引导作用和连接作用，也没有实际的含义。第二空的which引导的是一个非限制性定语从句，which指代前面一句话的内容在句中做主语。That不能引导非限制性定语从句，what不能引导定语从句。故选B。

6．The commercial city, Loulan, used to be a stopping point on the silk road between the West and the East, ______ by sandstorms from AD200 to AD 400.
A．which is believed to be covered over
B．as is believed to have been covered over
C．it is believed to be covered over
D．which is believed to have been covered over

全面分析：商业城市，楼兰，曾经是东西方丝绸之路上的一个停靠点，被认为从公元200年到公元400年被沙尘暴覆盖。此空是非限制性定语从句，不定式的完成式作补足语，故选D。

7．Soon after getting off his horse, the captain appeared at the second-floor windows, ______ he could see nothing but trees.
A．where B．from where C．which D．from which

全面分析：下马不久，上尉就出现在二楼的窗口了。他从那里除了树木什么也没看到。he could see nothing but trees.为非限制性定语从句修饰先行词at the second-floor windows，故用from where，相当于and from at the second-floor windows，而from where 比where具体形象，故选B。

8．_______ is often the case with children, Amy was better when the doctor arrived.
A．It B．That C．What D．As

全面分析：和孩子们的情况一样，医生来的时候 Amy 好多了。as is often the case with sb./sth. 固定句式，“情况常常如此，这是常有的事，通常就是这样”，此处是一个非限制性定语从句，故选D。

9．______ is known to all, good friends ______ happiness and value to life.
A．As; add to B．It; add C．What; add to D．As; add

全面分析：众所周知，好朋友给生活增添了快乐和价值。此处是as引导的非限制性定语从句；add—to—固定短语，“把—添加到—”。故选D。

10．She has many good friends,_________ are really kind to her and her parents.
A．most of them B．and most of whom
C．but most of whom D．most of whom

全面分析：她有很多好朋友，他们大多对她和她的父母都很好。 _________ are really kind to her and her parents. 是一个非限制性定语从句，先行词是 good friends ，先行词在句中作of的宾语，故选D。

11．Lifting weights is good for teenagers, ____some experts say will help them become energetic.
A．which B．what C．why D．whom

全面分析：举重对青少年有好处，一些专家说，这能帮助他们变得精力充沛。分析句子可知，此空格是指代前面的“举重对青少年有好处”这件事有助于使他们精力充沛。定语从句中的which可指代前面的一句，因此选A。

12．Below the mountains, the sunshine reflects on the many lakes, ____makes them shine like diamonds against the rich countryside.
A．as B．that C．which D．what

全面分析：在山下，阳光反射在湖面上，这使得它们像钻石一样照耀着富裕的乡村。分析句子可知，which代替前面的整个句子，在后面的非限制性定语从句中作主语。故选C。

13．I would rather my brother were in beijing, in _______case he would accompany me to the bookstore.
A．that B．what C．which D．whose

全面分析：我宁愿我哥哥在北京，假如那样的话，他就会陪我去书店了。非限定性定语从句中用关系代词which，指代前面一件事。故选C。

14．I often stay up late into the night, _________ leads to my sleeping in class.
A．that B．which C．it D．what

全面分析：我晚上经常熬夜，这导致我上课时睡觉。此处是非限定性定语从句，关系词指代前面的内容，在从句中作主语，故选B。

15．_____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful.
A．That; what B．What; which C．It; which D．As; that

全面分析：众所周知，中国已经发射了神州7号宇宙飞船，这是中国首次成功的太空行走。第一空处为主语从句，从句缺少主语，需用what引导；第二空所在句子是个定语从句，先行词为整个主句的内容，从句中缺少主语，需用which引导。故选B。

16．The problem with traffic crowdedness in the city put forward at the meeting, the government takes into consideration, is of great importance.
A．what B．where C．which D．as

全面分析：句意: 会议上提出的城市交通拥挤问题非常重要，政府考虑到了这个问题。分析句子可知，The problem with traffic crowdedness in the city put forward at the meeting为先行词，作take的宾语，又根据逗号，判断出本句为非限制性定语从句，所以关系代词为which。What不能引导定语从句。先行词在定语从句作宾语，所以不能用关系副词when。as是”正如”的意思,不符合句意。故选C。

17．The last line added was Jubilee Line, was opened in honor of the 25th anniversary of Elizabeth _____the queen.
A．which; becoming B．where; becoming
C．which; to have become D．where; to have become

全面分析：最后增加的是Jubilee Line，这是为了纪念伊丽莎白成为女王25周年而开通的。此处Jubilee Line是先行词，指物，在后面的非限制性定语从句中作主语，所以第一个空填which；介词后面用动名词作宾语，所以第二空填becoming。故答案选A。

18．The first trials of Aspirin took place in 1899, ____ the company Hoffmann worked for ___distributing the medicine in powder form to physicians to use with patients.
A．when; began B．which; beginning
C．when; beginning D．which; began

全面分析：阿司匹林的第一次试验发生在1899年，当时霍夫曼供职的公司开始将这种粉末形式的药物分发给医生，供病人使用。此处1899是先行词，在后面的非限制性定语从句中作时间状语，所以第一个空填when；根据in 1899，可知后面的非限制为性定语从句用一般过去时态，所以第二空填began。故答案选A。

19．People can unlock the shared bikes, _________are equipped with GPS and can be left anywhere in public, by simply _________their smart phones.
A．which; use B．which; using
C．of which; use D．of which; using

全面分析：仅凭自己的智能手机人们能够解锁共享单车，这些共享单车配备了全球定位系统，可以被放在公共场合的任何地方。“ are equipped with GPS and can be left anywhere in public”为非限制性定语从句，先行词为the shared bikes，指物，且先行词在从句中做主语，故用which指代。第二个空位于介词by的后面，用use动名词的形式做宾语，填using。综上，选B。

20．Yesterday, I went back to my primary school, ________ my teachers and I talked about our good old days.
A．which B．that C．when D．where
【解析】【分析。句意：昨天我回到了我的小学，在那里我和老师谈起了美好的旧时光。先行词为primary school，从句中缺少地点状语，故选D。

21．China's first self-designed modem bridge reopened to road traffic, we Chinese were so proud when it was built 50 years ago.
A．to which B．for which C．in which D．of which

全面分析：中国第一座自行设计的现代化大桥对道路运输重新开放，50年前它被建造，我们中国人为之自豪。 we Chinese were so proud when it was built 50 years ago.是一个定语从句，先行词是China's first self-designed modem bridge，关系词在从句中作宾语，指物，be proud of固定短语，“以……而骄傲”，介词提到关系代词的前面，故选D。

22．The old pictures bring the Greens to the days they spent together, life was hard but happy.
A．which; when B．which; whose C．when; whose D．when; which

全面分析：这些老照片把他们带回了一起度过的日子，那时生活虽然艰难，但很幸福。分析句子可知，本句是定语从句。The old pictures是主语， bring为谓语动词，宾语是 the Greens，而 the days为to的介词宾语。the days被一个定语从从句修饰，the days是先行词在定语从句中作spent的宾语，因此指物可用which，第二个空是修饰先行词the days在后面的从句中作时间状语，即在那时，要用 in which或when。故答案选A。

23．A lot of measures have been taken recently, of benefits, however, some are difficult to see in the short term.
A．what B．whose C．which D．whom

全面分析：最近已经采取了许多措施，其中一些措施的好处在短期内很难看到。考查定语从句。此处measures做先行词，在后面的定语从句中作定语，用whose引导定语从句，故答案为：B。

24．Only those, as Albert Einstein once said in one of his famous books, ______ attempt the absurd can achieve the impossible.
A．who B．which C．whose D．where

全面分析：正如阿尔伯特·爱因斯坦在其著名著作之一中所言，只有那些尝试荒谬的人才能实现不可能的事情。此处为定语从句，先行词是those（那些人），关系词在从句中做主语，应使用关系代词who引导。故选A。

25．Many people, some of ______ are not overweight at all, are always going on diets or taking weight-loss pills, _____ are often dangerous.
A．who, that B．whom, that C．who, which D．whom, which

全面分析：很多人，其中一些根本没有超重，总是在节食或服用减肥药，这通常是危险的。句中有逗号，说明是非限制性定语从句，且of后只能跟whom/which，这里指人，of后跟whom，排除A、C；第二个非限制性定语从句指代“节食”和“吃减肥药”，非限制性定语从句不能使用that，且从句缺少主语，排除B，故选D。

26．—Thank you for your assistance, without ___I might have been in danger.
—That's all right, anyone in my place ________ the same thing.
A．that; will do B．it, would
C．which; can have done D．which; would have done

全面分析：——谢谢你的帮助，没有你的帮助我可能会有危险。——没关系，无论是谁处在我这样的位置，都会这么做的。without ___I might have been in danger.是一个非限制性定语从句，先行词是your assistance，介词+关系代词引导的定语从句，指物，只能用which；与过去事实相反的假设，其句子结构为：从句：If+主语+过去完成时+其他，主句：主语+should(would, could, might)+现在完成时+其他，故选D。

27．Kae, _________sister I shared a room with when we were at college, has gone to work in Australia.
A．whom B．that C．whose D．her

全面分析：凯特已经去澳大利亚工作了。大学的时候，我和她的姐姐共住一室。本句是由whose引导的非限制性定语从句，句中先行词为Kate，关系词在非限定性定语从句中作名词sister的定语，用whose。故选C。

28．We will put off the picnic in the park until next week, ____ the weather may be better.
A．that B．where C．which D．when

全面分析：我们将把公园的野餐推迟到下个星期，那时天气可能会更好。本句是定语从句，先行词是时间名词next week，关系词在从句中作时间状语。故选D。

29．She and her family bicycle to work, _________ helps them keep fit.
A．which B．who C．as D．that

全面分析：她和家人骑自行车去上班，这有助于她们保持健康。本句是由which引导的非限制性定语从句，which指代整个主句的内容，引导词在从句中做主语，故该从句应用关系代词which引导。故选A。

30．Helen managed to go to university by borrowing money from the bank, ______ turned out to be a wise decision.
A．what B．where C．which D．it

全面分析：海伦设法从银行借钱上大学，结果是一个明智的决定。分析句子可知，这是一个非限定性定语从句，关系代词which指代前面的一件事。故答案选C。

31．Blog discussions may be closed to new comments, ____a message is displayed informing you of that.
A．in what case B．in that case C．in whose case D．in which case

全面分析：博客讨论可能不接受新的评论，在这种情况下，会显示一条消息通知您。句中which case指代前面一句话的内容，引导非限制性定语从句，in which case意为“在这种情况下…”。选项中what不能引导定语从句，that通常不能放在介词的后面，whose的语义不搭配。故选D。

32．The general at last got a chance to visit the village ________ he used to fight, ________ he had been dreaming of for years.
A．that; which B．where; that
C．in which; what D．where; which

全面分析：将军最后有机会去他曾经打过仗的村子，这是他梦想了很多年的。where he used to fight是定语从句，修饰先行词the village，关系副词where在从句中作地点状语，即：he used to fight in the village，当然in which也是可以的。which he had been dreaming of是非限制性定语从句，不能用that引导。what不能引导定语从句。选D。

33．The Alibaba Group, __________ was founded in 1999, has become China's largest e-commerce company.
A．which B．what C．whose D．where

全面分析：阿里巴巴集团在1999年成立，它已经成为中国最大的电商公司。The Alibaba Group作先行词，在定语从句中做主语，用关系代词which。故选A。

34．Nowadays teenagers like to go to fast food restaurants, __________, as the name suggests, eating doesn't take much time.
A．which B．who C．where D．that

全面分析：考查定语从句：句意：现在年轻人喜欢去快餐店，就像名字表明的那样，在那里吃东西不会花很长时间。先行词是fast food restaurants,定语从句中不缺主宾表，却地点状语，用where引导定语从句。选C。

35．It rains a lot these days， _______ prevents us from going out.
A．it B．that C．this D．which

全面分析：这些天下雨很多，这阻止了我们外出。_______ prevents us from going out.是一个非限制性定语从句，修饰整个主句内容，that不能引导非限制性定语从句，故选D。

36．He is a man with rich experience, from ______ much can be learned.
A．whom B．which C．where D．what

全面分析：他是一个经验丰富的人，可以从他身上学到很多东西。此处man是先行词，指人，在后面的定语从句中作介词from的宾语，介词后面指人用from，指物用which，故选A。

37．Since the establishment of the 5th Nanyang Municipal Committee of CPPCC, 2,988 proposals have been received, 2,695 have been put on file.
A．of which B．whose C．in which D．with which

全面分析：自从政协南阳市委员会第五次会议以来，已经接受了2988件提案，其中2695件已经被记录在案了。定语从句的先行词是2,988 proposals, 而2,695proposals是属于2,988 proposals当中的一部分，要用介词of ，先行词作of的宾语，要用关系代词which，故选A。

38．The mountain, name means “flowers and fruits”, attracts millions of tourists every year thanks to its mythical status and beautiful scenery.
A．which B．whose C．where D．in which

全面分析：由于神话人物和美丽的景色，名字意味着“花和水果”的这座山每年都能够吸引千百万的游客。从句子结构可知，非限制性定语从句，先行词是the mountain，在从句中作定语，要用关系代词whose，故故选B。

39．In particular, we associate ancient Greek civilization with the capital city of Athens, _________ is the Acropolis.
A．the greatest symbol of which B．of which greatest symbol
C．whose the greatest symbol D．of whose greatest symbol

全面分析：特别的是，我们把古希腊文明和雅典的首都联系起来，雅典的象征就是卫城。本题定语从句的先行词是the capital city of Athens，关系代词which指代先行词the capital city of Athens，在定语从句中做介词of的宾语。故选A。


40．If an excellent Chinese novel is translated into English, ____ means many more people in the world can enjoy it.
A．as B．which C．what D．that

全面分析：如果一个优秀的中文小说被翻译成英语，这意味着世界上更多的人可以享受它。If引导的是条件状语从句，后面应该是主句，as，which应该引导非限制性定语从句，what应该名词性从句，这里用那个that做主句的主语，指上文的内容。故答案选D。


41．She and her family bicycle to work, _________ helps them keep fit.
A．which B．who C．as D．that

全面分析：她和家人骑车去上班，这帮助他们保持健康。这是一个非限制性定语从句，空格处指代前面整个句子，所以用which引导非限制性定语从句，而且which在从句中作主语。who指人；that不引导定语从句；as通常翻译成“正如；就像”，所以此处可以排除，故答案为A。

42．Kae, _________sister I shared a room with when we were at college, has gone to work in Australia.
A．whom B．that C．whose D．her

全面分析：凯特已经去澳大利亚工作了。我们在大学的时候，我和她的姐姐共住一室。分析句子，句中先行词为Kate，在非限定性定语从句中作名词sister的定语，故用关系代词whose。故选C。

43．Smoking, ________________ is a bad habit, is, however, popular.
A．that B．which C．it D．though

全面分析：吸烟，一个不良习惯，但是很流行。________________ is a bad habit, 是一个非限制性定语从句，先行词是smoking，在从句中作状语，用关系代词which ，故选B。

44．Barbary was working in a company, __________ she went daily by bus.
A．which B．it C．that D．where

全面分析：考查非限制性定语从句。句意：巴巴拉在奥伯里工作，每天得坐公共汽车去上班。先行词是company，在从句中作地点状语，应用where。故答案选D。

45．This is the last factory he used to work at, many workers of .still have a good relationship with him.
A．/; it B．which; whom C．/; which D．which; that

全面分析：这是最后一个工厂，也是我过去常常工作的地方，那里的许多工人和我仍保持好的关系。这里 the last factory是先行词，在从句中at的宾语，因为有 the last 修饰，所以用关系代词that或者省略；第二空先行词仍然是factory，在从句中作介词的宾语，故用which，所以选C。

46．After graduating from college，I took some time off to go travelling，______ turned out to be a wise decision.
A．that B．which C．when D．where

全面分析：大学毕业之后，我花了些时间去旅游，结果证明是明智的选择。句中which引导非限定性定语从句，指代前面一件事。故选B。


47．The whole class applauded wildly at the end of the speech, __________ greatly encouraged Bob.
A．what B．where C．which D．when

全面分析：在演讲结束时，全班学生疯狂地鼓掌，这极大地鼓励了Bob。含有逗号的非限定性定语从句，which代替主句一句话的内容，作从句的主语，故选C。


48．People can unlock the shared bikes, are equipped with GPS and can be left anywhere in public, by simply their smart phones.
A．which; use B．which; using
C．of which; use D．of which; using

全面分析：仅凭自己的智能手机人们能够解锁共享单车，这些共享单车配备了全球定位系统，可以被放在公共场合的任何地方。“ are equipped with GPS and can be left anywhere in public”为非限制性定语从句，先行词为the shared bikes，指物，且先行词在从句中做主语，故用which指代。第二个空位于介词by的后面，用use动名词的形式做宾语，填using。故选B。


49．Teachers are those who use themselves as bridges, over they invite their students to cross．
A．them B．which C．whom D．those

全面分析：教师是这样的人，他们把自己作为桥梁，请学生横跨而过，并鼓励学生去修建自己的桥梁。bridges做先行词，指物，放在介词over后面引导非限制性定语从句，故选B。

50．John invited about 40 people to his wedding, most of ____________ are family members.
A．them B．that C．which D．whom

全面分析：约翰邀请了大约40人去他的婚礼，大部分人是家庭成员。先行词为40 people，定语从句中of 后缺少宾语，故使用whom。介词之后不能用that，应予以排除；which指先行词为物；them为人称代词，应用于并列句中。故选D。