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2024-2025学年八年级英语下册单元重难点高频易错题专练（沪教牛津版）
Unit 8 Life in the future 单元话题语法选择
一、语法选择
Long ago, Yan and Chang were good friends.
Yan lived 1． good life in a big house. One day he asked Chang 2． dinner at his house.
However, on the dinner table there was only one small dish of one small fish. Chang looked 3． at the fish. It was no 4． than a finger. Then he asked Yan if (是否)he could borrow a lantern.
"What for " Yan asked.
"Well, it's so dark in here," Chang said 5． a dry smile. "I can't see the other delicious dishes you cooked for me."
Chang kept a lot of ducks and chickens on his farm. One day, Yan 6． to visit him. At noon, Chang told Yan that he couldn't let him stay for lunch 7． there wasn't much food to eat. Yan looked out at Chang's farm 8． for a moment. Then he asked Chang if he had a big knife (刀).
"Yes, but what for " Chang asked.
"I'm thinking about killing my horse so we'll have something for lunch." Yan said.
"But how 9． you go home without it "
"Well, you wouldn't mind giving me one of 10． many ducks or chickens so I can ride it home,
would you "
1．A． a B． an C． the
2．A． had B． to have C． having
3．A． quiet B． quietness C． quietly
4．A． big B． bigger C． the biggest
5．A． in B． by C． with
6．A． comes B． came C． was coming
7．A． and B． but C． because
8．A． animal B． animals C． animals'
9．A． can B． must C． should
10．A． you B． your C． yours
11．语法选择
Life in the year 3044 is very different （1） life in the 2lst century. We still do many of the things you did, but we do them （2） . For example, we now have e-friends to help us and keep us company. An e-friend is a machine that looks just （3） a human being. It can walk and talk and can do almost （4） we human beings do. My e-friend is a lot like me and we have （5） fun together. She helps me （6） my homework and we often go swimming. She is programmed to take care of me if anything （7） , so I always feel safe when we are together. She can also send me messages, just like old-fashioned emails, and I can download information from her memory. It's great （8） an e-friend—I am never lonely and I always have someone to talk （9） .
I would like to tell you more about life in the year 3044, but I have to send my e-friend to clean up my room. Maybe （10） I will be able to travel back in time and visit you.
（1）A．of B．from C．in D．with
（2）A．different B．difference C．differently D．differences
（3）A．like B．for C．at D．up
（4）A．something B．none C．nothing D．everything
（5）A．many B．a number of C．a lot of D．the number of
（6）A．with B．at C．on D．doing
（7）A．will happen B．happens
C．happened D．is going to happen
（8）A．have B．having C．to have D．has
（9）A．to B．about C．with D．Both A and C
（10）A．one day B．in one day C．after one day D．with one day
语法选择
There is a cat in the Shrek movies. The cat's name is Puss. He always 12． a hat, a sword and a pair of boots(靴子). And he likes to help 13． . Do you want to know more about this cat in boots You can see 14． movie Puss in Boots.
Before Puss meets Shrek, he arrives at a town. Puss 15． a childhood friend, Humpty. They have the same dream. They want 16． the magic beans(魔豆). 17． two bad persons, Jack and Jill want to use the beans to rule (统治) the world. They have already taken a few steps ahead. They put the magic beans in a box and a wild pig watches the beans day and night. Puss has to 18． the beans to save the town. What he has done makes 19． a brave hero among the people in the town.
The movie is very popular 20． American kids. Let's see what they said.
"Humpty is very funny. Jack and Jill are a little crazy," said Ryan.
"This cartoon movie is 21． cool! You can't miss it," said Nicole.
12．A． wore B． wear C． wears
13．A． others B． other C． the other
14．A． a B． the C． an
15．A． had B． will have C． has
16．A． find B． finding C． to find
17．A． But B． So C． If
18．A． get B． getting C． got
19．A． he B． him C． his
20．A． in B． with C． on
21．A． reality B． real C． really
语法选择题
Chinese culture, with its long history, 22． around the world. For example, paper-cutting. 23． origins can be traced to the Han Dynasty, is still popular today. To keep this tradition alive, some artists 24． special tools next week to prepare for an exhibition in the Guangzhou Museum. It must be exciting 25． their beautiful works.
26． paper art, traditional festivals are also key parts of Chinese culture. The Spring Festival, 27． important festival in China, is celebrated with family reunions every year. At this festival, many colourful lanterns 28． in the parks to attract the visitors. Families always look forward 29． the festival every winter.
Tea culture also plays 30． important role in Chinese culture. In the past, green tea was drunk only 31． emperors, 32． now it is enjoyed by everyone. 33． it rightly, one needs to wash the tea leaves 34． . When serving tea to guests, the host should 35． the cup with both hands.
36． necessary for us to pass down these traditions to future generations.
22．A． will love B． was loved C． is loved D． loves
23．A． its B． their C． it's D． they' re
24．A． use B． will use C． used D． have used
25．A． to watch B． watching C． watch D． watched
26．A． To B． Except C． With D． Besides
27．A． more B． the most C． most D． very
28．A． shows B． are shown C． is shown D． showed
29．A． to B． for C． with D． at
30．A． a B． an C． the D． /
31．A． with B． for C． by D． to
32．A． but B． and C． so D． because
33．A． Enjoy B． Enjoying C． Enjoyed D． To enjoy
34．A． care B． careful C． carefully D． careless
35．A． holds B． is holding C． held D． hold
36．A． That's B． It's C． This is D． What's
请通读下面短文，掌握其大意，根据语法和上下文连贯的要求，从每小题所给的三个选项中选出一个最佳答案。
Basketball is part of students' everyday life at school. Recently, our school has held a basketball match between 37． .
I am one of the members of the basketball team in my class. My teammates and I have been excited but a bit nervous 38． we knew about the match. We practised for months, training 39． than any other team. When 40． match began, almost all students went to the playground to watch. When we were playing, our classmates and fans cheered for us 41． loudly that we always wanted to do better.
However, during the semi-finals（半决赛）, our captain 42． and hurt his knee. " Don't worry about me, " he said bravely, passing the ball to me. I got the ball and went on fighting 43． the other teammates. We did our best till the last moment. 44． we lost that game, we were still proud of ourselves.
We' ve learned a lesson from the match: winning is not always the most important, but 45． together to overcome difficulty is! Basketball is no longer just a sport - - it 46． a bridge connecting our hearts. Now we are more confident and ready to face future challenges.
37．A． class B． class' C． classes
38．A． for B． since C． when
39．A． hard B． harder C． hardest
40．A． a B． an C． the
41．A． very B． such C． so
42．A． falls B． fell C． was falling
43．A． against B． with C． for
44．A． Although B． Because C． So
45．A． work B． working C． to work
46．A． has become B． became C． was becoming
请通读下面短文，掌握其大意，根据语法和上下文连贯的要求，从每小题所给的三个选择中选出一个最佳答案。
Tracy is 16 years old. She has many hobbies, but baking（烘焙）and painting are her favorite. One day, when Tracy 47． cookies in the kitchen, she suddenly had an idea. "Why not paint on my cookies I can paint 48． of my family on them!"
Tracy shared her idea 49． her father. He thought it was impossible for Tracy to finish it, 50． he still supported（支持）her. He bought her three colors: yellow, red, and blue. Tracy mixed them 51． more colors. After watching some online videos on cookie painting, Tracy started making her cookie faces.
One day, when Tracy was painting on her cookies, she noticed 52． stranger. He looked through the kitchen window and got closer to look more carefully.
" 53． lovely cookies!" he said. "Hi, you' re David's daughter I'm your father's friend, Sam Miller. "
"Mr Miller, 54． pastry master（糕点大师）in our country " Tracy asked.
"Yes. Have you ever taken any baking classes " asked Mr Miller.
"No, but I 55． some baking competitions before. " Tracy answered.
"I love your cookie faces. Would you like to join in my cooking show next week " Mr Miller asked.
"Sure!" Tracy said 56． . Tracy is making her dream come true!
47．A． makes B． was making C． made
48．A． face B． faces C． face's
49．A． with B． to C． for
50．A． or B． but C． and
51．A． create B． creating C． to create
52．A． a B． an C． the
53．A． What B． How C． What a
54．A． famous B． more famous C． the most famous
55．A． win B． won C． have won
56．A． happy B． happily C． happiness
答案解析部分
1．A；2．B；3．C；4．B；5．C；6．B；7．C；8．B；9．A；10．B
本文是一篇记叙文。本文讲述了一个关于两个朋友相互"作弄"对方的故事。
考查语法选择。语法选择题是检验考生语法掌握情况的重要方式。以下为语法选择的常用解题技巧。
1. 理解题意：仔细阅读题目，确保完全理解问题的含义和要求。注意使用限定词，这些词往往提供了关于答案的重要信息。了解上下文语境，这对于理解句子结构和词汇使用至关重要。
2. 了解语法规则：对于常见的语法规则，如时态、语态、主谓一致等，要有清晰的认识。查阅相关的语法书籍或资料，巩固你的语法知识。
3. 找准关键词语：题干中往往带有对解题起着关键作用的词语，迅速找准这些词语。结合各选项的意义和特点，迅速缩小选择范围。
4. 分析句子结构：注意句子的结构，特别是主句、从句、修饰语等部分。仔细分析句子的构造，避免被复杂的句子结构所迷惑。
1．Yan在大房子里过着美好的生活。a一，不定冠词，用于辅音音素开头的单词前；an一，不定冠词，用于元音音素开头的单词前；the这个，定冠词。live a/an+形容词+life表示"过着一种……生活"，固定表达，good以辅音音素开头，所以不定冠词用a，故选A。
2．一天，他邀请Chang 去他家吃晚饭。had吃，过去式/过去分词；to have去吃，不定式；having吃，现在分词/动名词。ask sb to do sth"邀请某人做某事"，固定短语，故选B。
3．Chang安静地看着鱼。quiet安静的，形容词；quietness安静，名词；quietly安静地，副词。空处修饰动词looked，所以用副词，故选C。
4．它还没有一根手指大。big大的，原级；bigger更大的，比较级；the biggest最大的，最高级。根据"than"可知，此处用比较级bigger。故选B。
5．Chang干笑着说。in在……里面；by通过；with带着。根据"said...a dry smile"可知，应是干笑着说，表示伴随，用with，故选C。
6．一天，Yan 来拜访他。comes来，三单形式；came来，过去式；was coming过去进行时。根据"One day"可知，时态是一般过去时，所以用动词的过去式，故选B。
7．中午，Chang告诉Yan，他不能让他留下来吃午饭，因为没有太多的食物可吃。and和；but但是；because因为。空后"there wasn't much food to eat"是解释空前"不能让他留下吃饭"的原因，所以用because连接，故选C。
8．Yan 看了一会儿Chang家农场里的动物。animal动物；animals动物，复数；animals'动物的，所有格。空处在句中作宾语，所以用名词，且此处是泛指农场里的所有动物，所以用复数，故选B。
9．你没有马怎么能回家呢？can能；must必须；should应该。根据"how... you go home without it"可知，应是说没有马怎么能回到家，故选A。
10．那你不介意从你众多的鸭子或鸡中挑一只给我让我骑回家吧？you你，主/宾格；your你的，形容词性物主代词；yours你的，名词性所有代词。空处修饰名词ducks，所以用形容词性物主代词。故选B。
11．（1）B；（2）C；（3）A；（4）D；（5）C；（6）A；（7）B；（8）C；（9）D；（10）A
文章大意：本文主要讲述了3044年的生活是什么样子的。我们会有一个电子朋友，它是一台机器，长得像人类。它可以帮助我们做作业，和我们聊天，做运动，跟我们作伴。
（1）在3044年的生活是不同于21世纪的生活。of属于……的；from来自于；in在……里；with和，表伴随，用；根据句意和固定搭配be different from...与……不同.....可知用from，故答案为B。
（2）我们仍然会做很多做过的事情，但是做的方式不一样了。different不同，形容词；difference不同，名词；differently不同的，副词；differences不同，名词复数；根据句子结构可知这里是修饰动词，应该用副词修饰。故答案为C。
（3）电子朋友就是一个一台看起来像人类一样的机器。like像；for为了；at在；up向上；look 看起来像；look for寻找；look at看；look up查阅；like根据句意可知这里是看起来像，故答案为A。
（4）它会走路，会说话，会做我们人类会做的几乎每件事。something 一些事，一般用于肯定句中；anything任何事，一般用在否定句和疑问句中；nothing 没什么事，用于否定句中；everything每件事；根据句意和下文可知是几乎每件事。故答案为D。
（5）我的电子朋友很像我，我们在一起有很多乐趣。rmany很多，后跟可数名词的复数；a number of许多，后跟可数名词的复数；a lot of后跟可数名词的复数或不可数名词； the number of ....的数量。fun是一个不可数名词。故答案为C。
（6）她帮助我做作业，我们经常一起去游泳。with和，表伴随；at在……地点；on在……上， doing动名词，现在分词； 根据句意可知是帮助做作业，help sb with sth/help sb do sth帮助某人做某事。故答案为A。
（7）她被安装了程序，在我发生任何事的时候她来照顾我，所以我们在一起的时候我总是感到很安全。will happen将会发生，一般将来时；happens一般现在时，第三人称单数；happened一般过去时；is going to happen一般将来时，be going to形式，根据句意可知，这里是if引导的条件状语从句，从句中用一般现在时，主语是anything，动词用第三人称单数形式。故答案为B。
（8）有一个电子朋友是很棒的。have有，动词原形；having动名词，现在分词；to have动词不定式；has第三人称单数；根据固定句型是It is+形容词+to do sth做某事....可知用动词不定式，故答案为C。
（9）我再也不会感到孤独，总是有人跟我说话。根据句意和固定搭配talk with/to sb和某人谈话，可知介词to和with均可，故答案为D。
（10）或许有一天我可能穿越回去看望你。one day可指将来或过去的某一天；in one day，一天之后；after one day一天之后；with one day用一天；根据句意可知这里指将来的某一天。故答案为A。
考查完形填空。答题时首先要跳过空格通读文章掌握其大意，然后细读文章字斟句酌逐一作答，注意考虑句型，语法，搭配，语境等因素。最后通读一遍检查验证。
12．C；13．A；14．B；15．C；16．C；17．A；18．A；19．B；20．B；21．C
本文讲述了电影《穿靴子的猫》中，猫Puss的形象、经历，他和朋友寻找魔豆对抗坏人拯救城镇，以及这部电影在美国孩子中的受欢迎程度。
考查语法填空，注意结合上下文语境判断时态、词性，牢记固定搭配和常见语法规则。
12．他总是戴着一顶帽子，佩着一把剑，穿着一双靴子。wore是wear的过去式，意为"穿着；戴着（过去式）"；wear意为"穿着；戴着"；wears是wear的第三人称单数形式，意为"穿着；戴着（第三人称单数）"。句子主语He是第三人称单数，且根据always可知时态是一般现在时，所以动词要用第三人称单数形式。故选C。
13．并且他喜欢帮助其他人。others意为"其他人或物；别人"，是代词；other意为"其他的"，是形容词，后需接名词；the other意为"两者中的另一个"。此空作help的宾语，需要代词，other是形容词不符合，the other不符合语境，others表示"其他人"符合。故选A。
14．你可以看电影《穿靴子的猫》。a是不定冠词，泛指"一个"；the是定冠词，表特指；an是不定冠词，用于元音音素开头单词前，泛指"一个"。这里"movie Puss in Boots"是特指这部电影，所以用定冠词the。故选B。
15．穿靴子的猫有一个童年朋友，矮蛋。had是have的过去式，意为"有（过去式）"；will have意为"将会有"，是一般将来时；has是have的第三人称单数形式，意为"有（第三人称单数）"。句子是在陈述一般事实，主语Puss是第三人称单数，所以用has。故选C。
16．他们想要找到魔豆。find意为"找到；发现"，动词原形；finding是find的动名词形式；to find是find的动词不定式形式。want to do sth.是固定搭配，意为"想要做某事"，所以这里用to find。故选C。
17．但是，两个坏人，杰克和吉尔想要用这些魔豆统治世界。But意为"但是"，表转折；So意为"所以"，表因果；If意为"如果"，表条件。前文说Puss和朋友想找魔豆，后文说坏人想用魔豆统治世界，前后是转折关系，所以用But。故选A。
18．穿靴子的猫必须拿到魔豆来拯救这个城镇。get意为"获得；拿到"，动词原形；getting是get的动名词形式；got是get的过去式和过去分词。have to do sth.是固定用法，意为"不得不做某事；必须做某事"，所以这里用动词原形get。故选A。
19．他所做的事使他在镇里人眼中成为了一个勇敢的英雄。he意为"他"，主格；him意为"他"，宾格；his意为"他的"，形容词性或名词性物主代词。make是动词，后接宾语，要用宾格形式，所以用him。故选B。
20．这部电影在美国孩子中很受欢迎。in意为"在……里面"；with可构成be popular with，意为"受……欢迎"；on意为"在……上面"。be popular with是固定搭配，所以这里用with。故选B。
21．这部卡通电影真的很酷！你不能错过它。0reality意为"现实；实际情况"，名词；real意为"真实的；真正的"，形容词；really意为"真正地；确实"，副词。这里修饰形容词cool，需要用副词，所以用really。故选C。
22．C；23．A；24．B；25．B；26．D；27．B；28．B；29．A；30．B；31．C；32．A；33．D；34．C；35．D；36．B
主要讲了中国文化的三个重要组成部分——剪纸艺术、传统节日（以春节为例）和茶文化，并强调传承这些传统的重要性。
考查完形填空，完形填空，考查学生们在具体语境中运用语言的能力，综合性较强。做题时，应先通读短文，了解大意；然后根据上下文语境的提示做题，先易后难，注意辨析选项中的单词的意思和用法，并注意空前后的搭配；最后应再读一遍短文，检查答案。
22．拥有悠久历史的中国文化在世界各地受到喜爱。A will love将喜爱，一般将来时；B was loved被喜爱，一般过去时被动语态；C is loved被喜爱，一般现在时被动语态；D loves喜爱，一般现在时主动语态）。主语culture是动作love的承受者，时态是一般现在时，所以用一般现在时的被动语态，结构是be+动词过去分词，主语culture是不可数名词，所以be动词用is，love的过去分词是loved，故选C。
23．例如，剪纸，它的起源可以追溯到汉代，至今仍然很受欢迎。A its它的，形容词性物主代词，修饰名词；B their他们的，形容词性物主代词，修饰名词；C it's它是；D they're他们是。origins起源，名词，所以用形容词性物主代词，这里指的是剪纸的起源，所以用its表示"它的"，故选A。
24．为了保持这一传统，一些艺术家下周将使用特殊工具为广州博物馆的展览做准备。A use使用，一般现在时；B will use将使用，一般将来时；C used使用，一般过去时；D have used已经使用，现在完成时。根据时间状语next week，可知这里描述的是将来的动作，所以用一般将来时，结构是will+动词原形，故选B。
25．观看他们的精美作品一定会很令人兴奋。A to watch观看（不定式）；B watching观看（动名词或现在分词）；C watch观看（原形）；D watched观看（过去式或过去分词）。it is exciting to do sth. 或 it is exciting doing sth.都可以表示"做某事很令人兴奋"，但在这里，由于句子结构更偏向于描述一种持续的状态或行为（即观看作品这一行为），所以用动名词watching更合适，且更常见于这种语境中，故选B。
26．除了纸艺，传统节日也是中国文化的重要组成部分。A To到；B Except除了（不包括）；C With和；D Besides除了（包括）。根据traditional festivals are also key parts of Chinese culture传统节日也是中国文化的一部分，可知讲的是除了剪纸，传统节日是包括在内的，所以用Besides，故选D。
27．春节，中国最重要的节日，每年都会以家庭团聚的形式庆祝。A more更；B the most最； Cmost最，无定冠词the时不可单独使用；D very非常。根据in China表明是最高级，所以用最高级the most，故选B。
28．在这个节日里，公园里会展示许多彩色的灯笼来吸引游客。A shows展示（一般现在时第三人称单数）；B are shown被展示（一般现在时被动语态复数）；C is shown被展示（一般现在时被动语态单数）；D showed展示（一般过去时）。主语lanterns是动作show的承受者，时态是一般现在时，所以用一般现在时的被动语态，结构是be+动词过去分词，主语lanterns是复数，所以be动词用are，show的过去分词是shown，故选B。
29．每个冬天，家庭总是期待着这个节日。A to到；B for为了；C with和；D at在。look forward to期待，固定搭配，故选A。
30．茶文化在中国文化中也扮演着重要的角色。A a一个（辅音音素前）；B an一个（元音音素前）； Cthe这个（定冠词）；D /不填。play an important role in在……中扮演重要角色，固定搭配，且important是以元音音素开头的单词，所以用an，故选B。
31．在过去，绿茶只有皇帝才能喝。A with和；B for为了；C by被；D to到。根据语境可知这里说的是绿茶在过去只有皇帝才能喝，即绿茶是被皇帝喝的，所以用by表示被动关系，故选C。
32．但现在每个人都喜欢喝绿茶。A but但是，表示转折；B and和，表示并列；C so所以，表示结果；D because因为，表示原因。根据In the past在过去，和now现在，这里描述的是过去和现在的对比，所以用but表示转折关系，故选A。
33．为了正确地享受绿茶，一个人需要仔细地清洗茶叶。A Enjoy享受（原形）；B Enjoying享受（动名词或现在分词）；C Enjoyed享受（过去式或过去分词）；D To enjoy享受（不定式）。根据句子可知这里描述的是为了享受绿茶而需要做的动作，所以用不定式表示目的，故选D。
34．为了正确地享受绿茶，一个人需要仔细地清洗茶叶。A care关心（名词或动词原形）；B careful仔细的（形容词）；C carefully仔细地（副词）；D careless粗心的（形容词）。根据语境可知这里描述的是清洗茶叶的方式，所以是仔细洗茶，wash洗，实义动词，副词修饰实义动词，所以用carefully，故选C。
35．当给客人倒茶时，主人应该用双手端着杯子。A holds端着（一般现在时第三人称单数）；B is holding端着（现在进行时）；C held端着（一般过去时）；D hold端着（原形）。should应该，情态动词，后面用动词原形，动词用原形hold，故选D。
36．对我们来说，把这些传统传给下一代是必要的。A That's那是；B It's它是；C This is这是；D What's什么是。It's+形容词+for sb.+to do sth.对某人来说做某事是……的，固定搭配，故选B。
37．C；38．B；39．A；40．C；41．C；42．B；43．B；44．A；45．B；46．A
47．B；48．B；49．A；50．B；51．C；52．A；53．A；54．C；55．C；56．B
本文讲述了特蕾西喜欢烘焙和绘画，她有在饼干上画家人脸的创意，得到父亲支持，在制作饼干脸时遇到糕点大师米勒先生，米勒先生欣赏她的作品并邀请她参加烹饪秀，特蕾西梦想成真的故事。
考查完形填空，注意结合语法知识（如时态、感叹句结构、固定搭配等）和上下文语境来选择答案。
47．一天，当特蕾西正在厨房做饼干时，她突然有了一个主意。makes（make的第三人称单数形式，一般现在时）；was making（make的过去进行时形式，表示过去某个时刻正在进行的动作）；made（make的过去式，一般过去时）。从句描述的是过去某一时刻正在进行的动作，用过去进行时"was making"。故选B。
48．我可以在上面画出我家人的脸！face脸（单数）；faces脸（复数）；face's脸的（名词所有格）。家人不止一个，所以用复数"faces"。故选B。
49．特蕾西和她父亲分享了她的想法。with和……一起，与；to到；for为了。"share sth. with sb."是固定搭配，意为"和某人分享某物"。故选A。
50．他认为特蕾西不可能完成这件事，但他仍然支持她。or或者；but但是；and和。前后句是转折关系，前句说认为不可能，后句说仍支持，用"but"。故选B。
51．特蕾西把它们混合起来以创造更多的颜色。create创造（动词原形）；creating（create的现在分词/动名词形式）；to create（动词不定式，表目的）。这里用动词不定式"to create"表目的，说明混合颜色的目的是创造更多颜色。故选C。
52．一天，当特蕾西正在给她的饼干上色时，她注意到一个陌生人。a一个（不定冠词，用于辅音音素开头单词前）；an一个（不定冠词，用于元音音素开头单词前）；the（定冠词，表特指）。这里泛指一个陌生人，"stranger"是辅音音素开头，用"a"。故选A。
53．多么可爱的饼干啊！What（引导感叹句，修饰名词）；How（引导感叹句，修饰形容词、副词）；What a（修饰可数名词单数）。"lovely cookies"是复数名词短语，用"What"引导感叹句。故选A。
54．米勒先生，您是我们国家最著名的糕点大师吗？famous著名的（原级）；more famous更著名的（比较级）；the most famous最著名的（最高级）。根据语境，这里是在询问是否是"最著名的"糕点大师，用最高级"the most famous"。故选C。
55．没有，但我以前赢过一些烘焙比赛。win赢（动词原形，一般现在时）；won（win的过去式，一般过去时）；have won（win的现在完成时形式，表示过去发生的动作对现在造成的影响）。"before"是现在完成时的标志词，强调过去的经历对现在的影响，用"have won"。故选C。
56．"当然！"特蕾西高兴地说。happy高兴的（形容词）；happily高兴地（副词）；happiness幸福，高兴（名词）。这里修饰动词"said" ，需要用副词"happily"。故选B。

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