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单选题50题（江苏地区期末真题汇编）-英语八年级下册
1．（22-23八年级下·江苏南京·期末）—I don’t know how to use the app Fun Dubbing.
—Ask Simon for help. He has lots of _______ in doing it.
A．trouble B．experience C．excuses D．chances
2．（22-23八年级下·江苏南京·期末）It’s polite ________ us _________quiet while eating.
A．for, to keep B．of, to keep C．for, keep D．of, keep
3．（22-23八年级下·江苏南京·期末）My mother _________ London. She _________ there for three days.
A．has gone to; has been to B．has been to; has been
C．has gone to; has been D．went; was
4．（22-23八年级下·江苏南京·期末）The age of 5G is coming. Chinese scientists are trying their best ________ the usage in many fields.
A．carrying on B．to carry with C．carrying with D．to carry on with
5．（22-23八年级下·江苏南京·期末）If someone is in your way, you should say “________” and wait for a while until they move.
A．Thank you B．Excuse me C．I’m sorry D．With pleasure
6．（22-23八年级下·江苏南京·期末）Our English teacher often asks us to speak English _______.
A．as much as possible B．as soon as possible
C．as hard as possible D．as little as possible
7．（22-23八年级下·江苏南京·期末）Some parents are too busy _________ children with their homework.
A．help B．to help C．helping D．to helping
8．（22-23八年级下·江苏南京·期末）—Could you manage, if you don’t mind, ________ the work on time
—No problem.
A．finishing B．to finish C．finished D．finish
9．（22-23八年级下·江苏徐州·期末）Which of the following is an opinion
A．Old people used to play chess in the park.
B．Some of my good friends have moved away.
C．The new shopping mall is a good place to have fun.
D．Great changes have taken place in Millie’s hometown.
10．（22-23八年级下·江苏徐州·期末）Mary is playing the piano every time I see her. She believes in ________.
A．it never rains but it pours B．many hands make light work
C．practice makes perfect D．the early bird catches the worm
11．（22-23八年级下·江苏徐州·期末）If you bump into someone in the street, you should say “________”.
A．I’m sorry B．thank you C．excuse me D．please
12．（22-23八年级下·江苏徐州·期末）Simon, don’t take any ______. Climbing the wall is dangerous.
A．difficulties B．experiences C．exercises D．risks
13．（22-23八年级下·江苏徐州·期末）You will not get the prize ________ you finish all the tasks. Keep trying!
A．after B．because C．when D．until
14．（22-23八年级下·江苏徐州·期末）UNICEF ______ in Europe in 1946 after World War Ⅱ.
A．sets up B．was set up C．has set up D．is set up
15．（22-23八年级下·江苏徐州·期末）Dad isn’t at home. He ________ since last month.
A．left B．has left C．has been away D．went away
16．（22-23八年级下·江苏徐州·期末）I cannot decide ______ to read first, the novel or the play.
A．when B．who C．which D．how
17．（22-23八年级下·江苏徐州·期末）Writing names in red is not good, and we usually ______ it.
A．avoid B．advise C．allow D．accept
18．（22-23八年级下·江苏南通·期末）—Do you need more time
—If I ________ another two days, I’m sure I will make it better.
A．give B．am given C．will give D．will be given
19．（22-23八年级下·江苏南通·期末）—I can’t believe Andy has won the first place!
—Yes, sounds ________ to believe.
A．too good B．good enough C．so good D．quite good
20．（22-23八年级下·江苏南通·期末）—It is ________ of you to work with these disabled people.
—Would you like to join us
A．difficult B．important C．helpful D．possible
21．（22-23八年级下·江苏宿迁·期末）—I have worked on the task for three hours. But I haven’t finished yet.
—________. Why not ask your classmates for help
A．Actions speak louder than words B．Practice makes perfect
C．Every dog has its day D．Many hands make light work
22．（22-23八年级下·江苏宿迁·期末）Some team members have given up, but Daniel will ________ with the project.
A．depend on B．turn on C．carry on D．take on
23．（22-23八年级下·江苏宿迁·期末）— ________ wonderful news! Messi came to Beijing to play a friendly football match with Australian team on June 18.
— Yes, We were all very excited about it.
A．What a B．What C．How a D．How
24．（22-23八年级下·江苏宿迁·期末）If you don’t study hard, you will ________.
A．take the lead B．fall behind C．make mistakes D．show off
25．（22-23八年级下·江苏宿迁·期末）All the team members should try their best to work ________ each other in a team.
A．close with B．close to C．closely with D．closely to
26．（22-23八年级下·江苏南京·期末）Slam Dunk movie ________ hotly among movie fans when it was shown in cinemas two months ago.
A．discussed B．was discussed
C．will discuss D．will be discussed
27．（22-23八年级下·江苏南通·期末）David’s dream is to go into the west and ________ a school for poor children there.
A．clean up B．look up C．give up D．set up
28．（22-23八年级下·江苏南通·期末）—We’ve got everything ready for the trip.
—You mean I ________ bring anything with me, right
A．can’t B．shouldn’t C．needn’t D．mustn’t
29．（22-23八年级下·江苏盐城·期末）—Mum, could you buy me a new smart phone after the final exam
—What Your smart phone is still in good ________.
A．condition B．introduction C．operation D．conversation
30．（22-23八年级下·江苏淮安·期末）—Have you ever been to the Summer Palace
—Yes. It ________ a big lake, a seventeen-hole bridge and some other attractions.
A．is made of B．is made from C．is made by D．is made up of
31．（22-23八年级下·江苏淮安·期末）—What are you ________ on the website, Amy
—The information about jobs.
A．searching for B．dreaming for C．standing for D．learning from
32．（22-23八年级下·江苏淮安·期末）—Why are the couple not at home today
—They ________ Tibet. That’s the place they like best.
A．have gone to B．have been to C．have been in D．are going to
33．（22-23八年级下·江苏淮安·期末）After a(n) ________ day’s work, I just wanted to go back home at once and lie on the bed.
A．relaxing B．exciting C．hard D．easy
34．（22-23八年级下·江苏盐城·期末）—Nobody will become a hero without others’ help.
—That’s true.________.
A．Practice makes perfect B．One finger can’t lift a small stone
C．The early bird catches the worm D．Where there’s a will, there’s a way
35．（22-23八年级下·江苏宿迁·期末）Mr. Wang is a teacher with lots of ________ and he has many teaching ________ in different places.
A．experience; experience B．experiences; experiences
C．experiences; experience D．experience; experiences
36．（22-23八年级下·江苏扬州·期末）—Must Andrew finish his DIY job before 7 p.m.
—No, he _______. He can _______ tomorrow.
A．mustn’t; hand in it B．needn’t; hand it in
C．don’t have to; hand it in D．mustn’t; hand in it
37．（22-23八年级下·江苏扬州·期末）—Could you tell me how many books I can borrow ________
—Sorry, ________ at all. Our computer system has broken down.
A．at a time; none B．on time; none C．from time to time; nothing D．at a time; nothing
38．（22-23八年级下·江苏扬州·期末）—Could you tell me how to renew the library books
—__________. Just log into the library website and renew books online.
A．That’s all right B．No way C．Not at all D．With pleasure
39．（22-23八年级下·江苏泰州·期末）It is better to travel 10,000 miles than to read 10,000 books, so it’s important to have real ________ with languages, cultures and societies.
A．communication B．experience C．knowledge D．confidence
40．（22-23八年级下·江苏泰州·期末）—Why did you put a ladder ________ the wall just now
—Because I wanted to ________ some beautiful pictures on the wall.
A．opposite; pick up B．on; make up
C．against; put up D．above; open up
41．（22-23八年级下·江苏泰州·期末）—Would you please look after my pet dog while I am on holiday in Sydney
—______. Have a nice trip.
A．You are welcome B．With pleasure
C．My pleasure D．That’s OK
42．（22-23八年级下·江苏泰州·期末）Too many cars have caused a lot of problems. ________, people cannot find enough parking spaces.
A．Moreover B．However C．For example D．Such as
43．（22-23八年级下·江苏无锡·期末）His daughter visited him ________. He felt very happy every time she came.
A．at a time B．on time C．some time D．from time to time
44．（22-23八年级下·江苏无锡·期末）The basketball final ________ for an hour, but we are still very excited.
A．has begun B．has ended C．has been on D．has been over
45．（22-23八年级下·江苏无锡·期末）How could I ________ such a warm invitation All I can do is just to accept it.
A．refuse B．realize C．receive D．touch
46．（22-23八年级下·江苏无锡·期末）— Can children under the age of 12 ride bicycles in the city
— No. According to the law, they ________.
A．may not B．mustn’t C．needn’t D．shouldn’t
47．（22-23八年级下·江苏无锡·期末）—How long have you stayed in China
—________ I was eight years old.
A．When B．Before C．Since D．Till
48．（22-23八年级下·江苏无锡·期末）The boy sat just ________ me, so I can see the sadness on his face clearly.
A．in front of B．behind C．opposite D．between
49．（22-23八年级下·江苏无锡·期末）To improve the reading ________, we should pay attention to (关注) the key words, instead of reading word by word.
A．speed B．time C．record D．direction
50．（22-23八年级下·江苏无锡·期末）Not only Jim but also his classmates ________ tired out after the match.
A．was B．were C．did D．made
参考答案：
1．B
【详解】句意：——我不知道怎么用“趣配音”这个应用程序。——找西蒙帮忙。他做这个有很多经验。
考查名词辨析。trouble困难；experience经验；excuses借口；chances机会。根据句意可知，西蒙应是做这个有很多经验，所以找他帮忙。故选B。
2．B
【详解】句意：我们吃饭时保持安静是有礼貌的。
考查介词和非谓语动词。固定句式：It’s+形容词+for/of sb to do sth，polite是修饰人的形容词，介词用of，动词不定式作主语，故选B。
3．C
【详解】句意：我妈妈已经到伦敦去了。她已经在那里三天了。
考查现在完成时。根据“She…there for three days.”可知，两个句子都应用现在完成时，且第一个句子应用have gone to表示“已经去了某地（人还没回来）”，根据“for three days”可知第二个句子应用have been there表示“已经在那里”一段时间了。故选C。
4．D
【详解】句意：5G时代即将到来。中国科学家正在尽全力在许多领域中推进使用。
考查动词短语及非谓语。carrying on表示对某件事情的 “坚持和继续”，动名词形式；to carry with随身携带，不定式； carrying with随身携带，动名词形式；to carry on with表示对某件事情的 “坚持和继续”，不定式。结合语境可知，此处指“继续坚持做……”，try one’s best to do sth.意为 “尽某人最大努力做某事”，应用其不定式。故选D。
5．B
【详解】句意：如果有人挡你的路了，你应说“打扰了”，然后等一会儿，直到他们走开。
考查情景交际。Thank you谢谢你；Excuse me打扰了；I’m sorry对不起；With pleasure非常乐意。根据“If someone is in your way”可知，要让别人让开路，应说打扰了。故选B。
6．A
【详解】句意：我们的英语老师经常要求我们尽可能多地说英语。
考查副词短语辨析。as much as possible尽可能多；as soon as possible尽快；as hard as possible尽可能努力；as little as possible尽可能少。根据“speak English”可知，是指尽可能多地说英语。故选A。
7．B
【详解】句意：一些家长太忙了无法辅导孩子做作业。
考查动词不定式作结果状语。根据“too busy”可知此处应用too…to do sth表示“太……以至不能做某事”。故选B。
8．B
【详解】句意：——如果你不介意，你能设法按时完成这个工作吗？——没问题。
考查动词不定式作宾语。根据“manage”可知，manage to do sth表示“设法做某事”，空处需填“to+动词原形”，finish“完成”，动词。故选B。
9．C
【详解】句意：以下哪一项是观点？
考查常识。Old people used to play chess in the park老人们过去常在公园里下棋；Some of my good friends have moved away我的一些好朋友已经搬走了；The new shopping mall is a good place to have fun新的购物中心是个娱乐的好地方；Great changes have taken place in Millie’s hometown Millie的家乡发生了巨大的变化。根据C项中的“a good place to have fun”可知，此句是表达观点，其他选项都是陈述事实。故选C。
10．C
【详解】句意：我每次见到玛丽都在弹钢琴。她相信熟能生巧。
考查习语。it never rains but it pours祸不单行；many hands make light work人多好办事；practice makes perfect熟能生巧；the early bird catches the worm早起的鸟儿有虫吃。根据“Mary is playing the piano every time I see her.”可知，此处指熟能生巧。故选C。
11．A
【详解】句意：如果你在街上碰到人，你应该说“对不起”。
考查情景交际。I’m sorry对不起；thank you谢谢你；excuse me打扰了；please请。根据“If you bump into someone in the street”并结合常识可知，如果你在街上碰到人，你应该道歉。故选A。
12．D
【详解】句意：Simon，不要冒险。爬墙很危险。
考查名词辨析。difficulties困难；experiences经历；exercises锻炼；risks冒险。根据“Climbing the wall is dangerous.”可知，爬墙很危险，所以此处是让Simon不要去冒险。risk意为“冒险”，符合语境。故选D。
13．D
【详解】句意：直到你完成所有任务，你才会得到奖品。继续努力！
考查连词词义辨析。after在……之后；because因为；when当……时；until直到。根据“You will not get the prize ... you finish all the tasks.”可知你不会得到奖品，直到你完成所有任务；not…until…“直到……才……”，固定结构。故选D。
14．B
【详解】句意：联合国儿童基金会于1946年第二次世界大战后在欧洲成立。
考查一般过去时的被动语态。根据“in Europe in 1946 after World War Ⅱ”可知句子应用一般过去时。主语为UNICEF，与动词set up存在逻辑上的被动关系，因此应用一般过去时的被动语态，其结构为：was/were+过去分词。故选B。
15．C
【详解】句意：爸爸不在家。他从上个月起就离开了。
考查时态及延续性动词。根据“since last month”可知，时态为现在完成时，此处应用延续性动词；leave“离开”，为非延续动词，其延续性结构为be away。故选C。
16．C
【详解】句意：我决定不了先读哪一个，小说还是剧本。
考查疑问词+动词不定式。when什么时候；who谁；which哪一个；how如何。根据“the novel or the play”可知，此处是询问先读哪一个。故选C。
17．A
【详解】句意：用红色写名字是不好的，我们通常避免用红色。
考查动词词义辨析。avoid避免；advise建议；allow允许；accept接受。根据“Writing names in red is not good”可知用红色写名字是不好的，所以此处指应避免用红色。故选A。
18．B
【详解】句意：——你需要更多的时间吗？——如果再给我两天时间，我相信我会做得更好。
考查动词的时态和语态。根据“if”可知是条件状语从句，遵循主将从现的原则，主句是一般将来时“will do”，从句是一般现在时表示将来。“I”和动词“give”是被动关系，用一般现在时的被动结构“am given”。故选B。
19．A
【详解】句意：——我不敢相信安迪得了第一！——是的，听起来太好了，难以置信。
考查短语辨析。too...to...太……而不能……；...enough to do sth.足够……做某事；so+形容词，如此……；quite+形容词，相当……。根据“I can’t believe Andy has won the first place!”可知，是太好了而不敢相信。故选A。
20．C
【详解】句意：——和这些残疾人一起工作，你真是乐于助人。——你愿意加入我们吗？
考查形容词辨析。difficult困难的；important重要的；helpful有帮助的；possible可能的。根据“to work with these disabled people.”可知和残疾人一起工作是乐于助人的，of与表示人品质的形容词连用，helpful符合题意。故选C。
21．D
【详解】句意：——这项任务我已经干了三个小时了。但我还没说完呢。——人多好办事。为什么不向你的同学求助呢？
考查习语。Actions speak louder than words事实胜于雄辩；Practice makes perfect.熟能生巧； Every dog has its day人人皆有得意日；Many hands make light work人多好办事。根据“I have worked on the task for three hours. But I haven’t finished yet”和“Why not ask your classmates for help”可知，此处建议向同学求助，故应是说“人多好办事”。故选D。
22．C
【详解】句意：一些团队成员已经放弃了，但丹尼尔将继续这个项目。
考查动词短语。depend on依靠；turn on打开；carry on继续；take on承担。根据“Some team members have given up, but Daniel will”可知是指丹尼尔将继续这个项目。故选C。
23．B
【详解】句意：——多么棒的消息！梅西于6月18日来到北京与澳大利亚队进行了一场友谊足球赛。——是的，我们对此都感到非常兴奋。
考查what引导的感叹句。根据“...wonderful news!”可知，感叹句的中心词为不可数名词，故应用what引导的感叹句，结构为What+形容词+不可数名词+主谓!。故选B。
24．B
【详解】句意：如果你不努力学习，你就会落后。
考查动词短语。take the lead带头；fall behind落后；make mistakes犯错；show off炫耀。根据“If you don’t study hard, you will”可知，应该说如果你不努力学习，你就会“落后”。故选B。
25．C
【详解】句意：所有的团队成员都应该尽他们最大的努力在一个团队中相互密切合作。
考查副词辨析和介词辨析。close接近地；closely紧密地。由空前动词“work”可知，表示“密切合作”，排除AB。with和；to到。根据“try their best to work...each other in a team”可知，是和彼此密切合作，用介词with。故选C。
26．B
【详解】句意：《灌篮高手》这部电影两个月前在影院上映时就引起了影迷们的热议。
考查被动语态。主语“Slam Dunk movie”与动词“discuss”是动宾关系，结合“ two months ago”可知此处是一般过去时的被动语态。故选B。
27．D
【详解】句意：戴维的理想是去西部，并在那里为贫困儿童建立一所学校。
考查动词短语辨析。clean up打扫干净；look up向上看，查阅；give up放弃；set up建立。根据“…a school for poor children there.”可知，此处是指为贫困儿童建立一所学校。故选D。
28．C
【详解】句意：——我们已经为旅行准备好了一切。——你的意思是我不需要带任何东西，对吗？
考查情态动词辨析。can’t不能；shouldn’t不应该；needn’t不需要；mustn’t禁止。根据“We’ve got everything ready for the trip.”可知已经为旅行做好了准备，结合“You mean I ... bring anything with me, right ”可知，此处是指不需要带任何东西。故选C。
29．A
【详解】句意：——妈妈，期末考试后你能给我买个新的智能手机吗？——什么？你的智能手机仍然状况良好。
考查名词辨析。condition状况；introduction介绍；operation操作；conversation对话。根据“Your smart phone is still in good”可知，此处固定短语in good condition“状况良好”。故选A。
30．D
【详解】句意：——你去过颐和园吗？——是的。它由一个大湖、一座十七孔桥和一些其他景点组成。
考查动词短语。be made of由……制成（看得出原材料）；be made from由……制成（看不出原材料）；be made by被……制造；be made up of由……组成。根据“a big lake, a seventeen-hole bridge and some other attractions.”可知，颐和园是由一个大湖、一座十七孔桥和一些其他景点组成，用短语be made up of。故选D。
31．A
【详解】句意：——艾米，你在网站上搜索什么？——关于工作的信息。
考查动词短语。search for搜索；dream for梦想；stand for代表；learn from从……学习。根据“The information about jobs.”可知，指在网上搜索与工作有关的信息，结合“What are you…”和语境可知，时态为现在进行时，结构为：are+现在分词。故选A。
32．A
【详解】句意：——为什么这对夫妇今天不在家？——他们去了西藏。那是他们最喜欢的地方。
考查have gone to，have been to和have been in的区别。have gone to去了某地（去而未归）；have been to曾经去过某地（去已归来）；have been in待在某个地方（一直都在）；are going to将要，一般将来时。根据语境可知，询问这对夫妇不在家的原因，答语表示那是他们最喜欢的地方，可推测这对夫妇去了西藏，且为去而未归，have gone to“去了某地（去而未归）”符合语境。故选A。
33．C
【详解】句意：辛苦工作了一天后，我只想马上回家躺在床上。
考查形容词辨析。relaxing令人放松的；exciting令人兴奋的；hard艰苦的；easy容易的。根据“I just wanted to go back home at once and lie on the bed.”可知，这里是辛苦工作了一天后，我只想马上回家躺在床上。故选C。
34．B
【详解】句意：——没有别人的帮助，没有人会成为英雄。——是真的。一根手指搬不动小石头。
考查习语。Practice makes perfect“熟能生巧”；One finger can’t lift a small stone“一根手指搬不动小石头”；The early bird catches the worm“早起的鸟儿有虫吃”；Where there’s a will, there’s a way“有志者事竟成”。根据“Nobody will become a hero without others’ help”可知，此处强调必须有人的帮助，所以选项B符合表达。故选B。
35．D
【详解】句意：王先生是一位很有教学经验的老师，并且他有很多在不同地方的教学经历。
考查名词。experience“经验”，不可数名词；experience“经历”，可数名词。第一空表示教学经验，故第一空填不可数名词experience；第二空表示教学经历，many修饰可数名词的复数形式，故第二空填可数名词experiences，故选D。
36．B
【详解】句意：——Andrew必须在下午七点前完成他的手工制作吗？——不，他不必。他可以明天交。
考查情态动词及动词短语。第一空must开头的一般疑问句，否定回答用为needn’t或don’t have to“不必”，主语是he，第三人称单数，故应用needn’t或doesn’t have to；hand in“上交”，跟代词连用时，代词应放在中间。故选B。
37．A
【详解】句意：——你能告诉我一次能借多少本书吗？——对不起，一本也不能。我们的计算机系统坏了。
考查介词短语和不定代词辨析。at a time每次；none没有一个；on time准时；from time to time不时；nothing没有东西。根据“Could you tell me how many books I can borrow...”和“Our computer system has broken down.”可知，询问每次能借多少本书，at a time“每次”符合语境，排除B和C，又因计算机系统坏了，看不到借书的数量，可推测此处是一本也没有，即数量上的完全缺失或不存在，none at all表示“一个都没有（数量的完全缺失）”。故选A。
38．D
【详解】句意：——你能告诉我如何续借图书馆的书吗？——很乐意啊。登录图书馆网站在线续借图书即可。
考查情景交际。That’s all right没什么；No way没门；Not at all 不用谢；With pleasure很乐意。根据“Just log into the library website and renew books online.”可知，应表达很乐意。故选D。
39．B
【详解】句意：读万卷书不如行万里路，所以对语言、文化和社会有真正的体验很重要。
考查名词辨析。communication沟通；experience经验；knowledge知识 ；confidence自信。根据“it’s important to have real...with languages, cultures and societies.”可知是有真正的体验是很重要的。故选B。
40．C
【详解】句意：——刚才你为什么把梯子靠在墙上？——因为我想在墙上挂一些漂亮的画。
考查介词辨析以及动词短语。opposite在……对面；on在上面；against靠着；above在上方；pick up捡起；make up编造；put up张贴；open up开放。根据“put a ladder...the wall”可知是把梯子靠在墙上，第一个空用against；根据“some beautiful pictures on the wall.”可知是在墙上挂一些画，第二个空用put up。故选C。
41．B
【详解】句意：——当我在悉尼度假时，你能照顾我的宠物狗吗？——我很乐意。旅途愉快。
考查情景交际。You are welcome不客气；With pleasure我很乐意；My pleasure别客气；That’s OK没关系。根据“Would you please look after my pet dog while I am on holiday in Sydney”可知，对于表示请求的句子，用“我很乐意”回答，故选B。
42．C
【详解】句意：太多的汽车造成了很多问题。例如，人们找不到足够的停车位。
考查介词短语。moreover而且；however然而；for example例如；such as例如。根据“Too many cars have caused a lot of problems...people cannot find enough parking spaces”可知此处是举例说明汽车造成的问题，空后是句子，用for example。故选C。
43．D
【详解】句意：他的女儿不时来看他。每次她来，他都感到非常高兴。
考查介词短语辨析。at a time一次；on time准时；some time一段时间；from time to time不时地。根据“His daughter visited him...He felt very happy every time she came.”可知，是指他的女儿不时地来看他。故选D。
44．D
【详解】句意：篮球决赛已结束一个小时了，但是我们仍然很激动。
考查延续性动词用法。has begun已经开始，非延续性动词；has ended 已经结束，非延续性动词；has been on已经开始，延续性动词；has been over已经结束，延续性动词。根据“but we are still very excited”可推测比赛“已经结束”，排除A、C选项，且空后“for an hour”为时间段，应与延续性动词搭配。故选D。
45．A
【详解】句意：我怎么能拒绝这么热情的邀请呢？我能做的只有接受。
考查动词辨析。refuse拒绝；realize意识到；receive收到；touch接触。根据“All I can do is just to accept it.”可知，没有拒绝。故选A。
46．B
【详解】句意：——12岁以下的儿童可以在这个城市骑自行车吗？——不可以。根据法律，他们不能这样做。
考查情态动词。may not可能不；mustn’t禁止；needn’t不必；shouldn’t不应该。根据“According to the law,”可知，法律规定的应是禁止12岁以下的儿童在这个城市骑自行车，用情态动词mustn’t，故选B。
47．C
【详解】句意：——你在中国待了多久？——从我八岁起。
考查连词辨析。when当；before在……之前；since自从；till直到。根据“How long have you stayed in China ”可知此处是回答时间段，故此处表示“从八岁起”，用since引导。故选C。
48．C
【详解】句意：男孩就坐在我的对面，所以我可以清楚地看到他脸上的悲伤。
考查介词辨析。in front of在……前面；behind在……后面；opposite在……对面；between在……之间。根据“I can see the sadness on his face clearly”可知，说话者与男孩面对面坐着。故选C。
49．A
【详解】句意：为了提高阅读速度，我们应该关注关键词，而不是逐词阅读。
考查名词辨析。speed速度；time时间；record记录；direction方向。根据“we should pay attention to (关注) the key words, instead of reading word by word.”可知，应该关注关键词而不是逐词阅读，这样做是为了提高阅读速度。故选A。
50．B
【详解】句意：比赛后，不仅吉姆而且他的同学们都很疲倦。
考查主谓一致。not only...but also连接并列成分作主语时，谓语动词遵循就近原则，此处的谓语动词与his classmates保持一致，tired out意为“疲倦的”，前面用be动词。故选B。

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