2025年中考英语一轮复习：科普知识类补全对话 素养提升练习题（含答案解析）

这是一份2025年中考英语一轮复习：科普知识类补全对话 素养提升练习题（含答案解析），共14页。试卷主要包含了补全对话等内容，欢迎下载使用。
在空格中填上适当的单词，使对话完整正确。一空一词（含缩写词）。
（N: Nick T: Taylr）
N: Dr. Taylr, I’m Nick frm Ppular Science. Nwadays peple are easily distracted (分心的). Hw cme?
T: It’s “the mnkey mind”. Yu feel it hard t stay fcused, like a mnkey 1 frm thught t thught.
N: Yeah. Many peple get mad with 2 fr having s many thughts.
T: It’s 3 t feel like this because humans have arund 6,000 thughts per day. S 4 it and make friends with yur mnkey mind. What if yur mnkey mind isn’t a 5 ? Perhaps it can remind yu t be curius and kind twards yur mind.
N: Umm, I see. 6 that, what else can we d t calm ur brain?
T: When the mnkey mind is getting busy, give it a jb t d. Use yur 7 , like watching a flwer, listening clsely t the birds, smelling the air r taking deep breaths. Ntice 8 yur thughts and feelings change.
N: That’s t say, try t fcus ur attentin first. When ur mind is calm, we can 9 ur wrk again.
T: That’s true. In the daily life, develping habits helps make yur brain strnger. Try drawing, reading, playing chess r else and see what 10 . Then keep practicing t strengthen yur brain’s pwer.
在对话的空格中填上适当的单词，使对话完整正确。一空一词（含缩略词）。
A: Have yu ever nticed the recent news that an 11 tmb（墓）f Sng Dynasty was discvered in the Sichuan Nrmal University.
B: Oh, 12 ? I have n idea at all. Tell me what happened.
A: On March 19, 2021, sme wrkers fund 8 pttery figurines（陶俑）by 13 when they were digging a sewer（下水道）in the university.
B: What did they d 14 ?
A: They immediately stpped digging and 15 t the plice.
B: They are very smart. And the students there 16 be excited abut it.
A: Yes, f curse. It 17 again that Chengdu has a lng histry.
B: Sure. It reminds me f the new discveries in Sanxingdui Ruins site.
A: Especially the 18 mask which shcked the whle wrld, right? Hw amazing it is!
B: I d agree. I’m s 19 f being brn and grwing up in Chengdu.
A: It is such a histrical but 20 city that mre and mre tall buildings and big cmpanies were seen in the lvely city t. I believe it will develp better in the future.
Bb, an exchange student frm the UK, is at Li Ming’s hme in Chengdu. They are talking abut the phts n the wall.
B-Bb L-Li Ming
B: What are yu picking in the pht?
L: Mulberries. Mulberries like these taste delicius.
B: Oh, really? Are mulberries 21 fruit in Chengdu?
L: Yes, there are a lt every May. Yu knw Sichuan has a lng histry f silk culture. Silk frm Chengdu became famus 22 as early as 2,000 years ag. I mean nearly all the peple in the cuntry knew it! And mulberry 23 are the main fd fr silkwrms.
B: I see. Where did yu pick the mulberries?
L: Inside an eclgical（生态的）park in Chengdu. 24 like picking mulberries and feeding silkwrms are ht in May.
B: Ww! The eclgical park 25 like a great place. What else can yu d in the park?
L: Yu can rent（租）a piece f land and grw crps r vegetables. Sme experts will give yu help if necessary. This way, yu can learn mre abut 26 .
B: That’s a gd way t 27 the life n the farm. It may help yu frget the pressure in life and feel 28 .
L: That’s true. It has many 29 . It als prduces fd fr the city and makes the city greener.
B: Culd yu 30 me there this weekend? I can’t wait t visit the eclgical park.
L: N prblem.
在空格中填上适当的单词，使对话完整正确。 一空一词（含缩写词）。
A: Hi, Sarah, have yu knwn the wrd “H-Y-G-G-E”?
B: Yes. The prnunciatin f “hygge” is /ˈhügə/.
A: It is s 31 . Is it an English wrd?
B: N, it isn’t. It’s a Danish (丹麦的) wrd. There is n English wrd fr the 32 meaning f it, accrding t Oxfrd Dictinaries. It might be 33 int “cmfrt” in English, but it is mre than that.
A: What des “hygge” mean t Danish peple?
B: At first, Hygge is used t describe the way f 34 lng and cld winter days because there can be up t 17 hurs f darkness every day. As a result, peple spend mre time 35 n a meal r ht drinks. Lighting candles is the mst imprtant part f 36 a situatin f “hygge”. Later, “hygee” als means picnics and utdr mvie nights.
A: N wnder Danish peple have happier lives than thse in many ther cuntries because they knw the 37 t happiness—“hygge”.
B: Yu’re right. Nw the idea f hygge is traveling abrad and becming 38 in sme ther cuntries, t. In England and in America, there are mre and mre hygge-themed ckbks and lifestyle guides. Helen Russell, the writer f The Year f Living Danishly said, “The rest f the wrld seems t be slwly waking up t d 39 Danish peple have been wise t d fr ages.”
A: I think we can practice the way f “hygge” by finding happiness in the 40 things in life.
B: I can’t agree with yu mre.
完成对话。在空格中填上适当的单词，使对话完整正确。一空一词（含缩写词）。
A: Nwadays, AI tls have becme very pwerful, surprising even their creatrs.
B: Yes. But I heard that sme peple said there shuld 41 a stp in AI wrk t make sure it’s safe.
A: Nt 42 agrees. And scientists have still been wrking t imprve AI mdels, mainly by training the mdels n larger and larger cllectins f infrmatin. Thse 43 are achieving sme successes.
B: I knw the AI tl that’s gtten the mst 44 recently is ChatGPT, created by the cmpany OpenAI. ChatGPT is a Large Language Mdel (LLM).
A: Yu’re right. ChatGPT 45 users t “chat” with a pwerful LLM. When asked a questin, ChatGPT answers quickly in perfect sentences.
B: S, I think it’s the mst intelligent tl f the wrld.
A: N. Last mnth OpenAI annunced a mre pwerful mdel, called GPT-4. GPT-4 can create and explain jkes, and 46 tests that are difficult fr humans.
B: The 47 prgress and mre general skills f recent AI mdels surely wrries sme peple.
A: As yu said, last week, many cmputer experts wrte a letter 48 fr a six-mnth stp fr any wrk n AI tls strnger than GPT-4.
B: Em. They mainly want gvernments t develp laws t make sure AI tls wn’t becme 49 .
A: But nt all AI experts agreed with the letter. Sme say the letter makes tday’s AI tls sund mre intelligent than they really are.
B: But the letter has sent a strng 50 that many peple-including leaders-will be thinking abut carefully.
在对话的空格中填上适当的单词，使对话完整正确。一空一词（含缩写词）。
A: Hi, Li Lei. Have yu nticed the slar hal(日晕) these days?
B: Of curse, Jenny. Many peple 51 the pictures n WeChat. And sme peple even predicted that there might be fld(洪水) in the summer.
A: Why d they think s?
B: Because the ancient Chinese said the 52 f slar hal meant it wuld rain at midnight while there wuld be strng winds if the lunar hal(月晕) came ut.
A: The slar hal has appeared several times 53 . S, many peple think there will be t much rain this summer, which will surely 54 flds easily. It sunds s scary.
B: Jenny, yu shuld study physics really hard nw. Slar hal which was 55 as the sign f rainy weather can be seen in many places in different times.
A: Yu mean it is a 56 natural phenmenn(现象). But what’s the reasn fr it?
B: When sunlight hits the ice crystals(冰晶) which are like mirrrs in the sky, light is 57 . Then the light will g t different 58 in different clrs.
A: I gt it! Slar hal is just a 59 phenmenn. N wnder yu ask me t study hard. It can’t be used t make 60 .
B: S there is n evidence that there will be fld this summer. As the develpment f mdern meterlgy(气象学), we’ll knw mre abut the nature.
A: Last time we talked abut the histry and 61 f paper.
B: Oh, yes! I remembered it was a Chinese wh first invented it 2,000 years ag. And it wasn't brught t the West until 1400.
A: Yes, but d yu knw what paper is used fr?
B: That's an easy questin. It's used fr bks, which I think is the mst imprtant because it prvides an imprtant way t cmmunicate with 62 . Mre peple can be educated because mre bks can be printed.
A: Yes, I agree.
B: Paper is als used fr newspapers, bxes, envelpes, paper bags...
A: Yes, actually half f the paper that is made is used fr such purpses. Have yu gt an idea abut ther 63 f paper?
B: I'm afraid nt.
A: There are many ther uses. Paper is very gd fr keeping yu 64 . Yu've perhaps 65 hmeless peple sleeping n a large number f newspapers.
B: Yes, I have. S they can 66 themselves against cld.
A: Yu're right. It's very cld in Finland. It's smetimes -40°C． The farmers wear paper bts in the snw. 67 culd be warmer.
B: Oh, that's unbelievable.
A: Nw mre and mre things are made f paper. We've had paper plates, cups and dishes fr a lng time. But nw we hear that chairs, tables, and 68 beds can be made f paper.
B: Fantastic!
A: Peple have made paper bats, but they haven't made paper planes r cars 69 . Just wait. They prbably will.
B: Well, yu're really an 70 n paper. Hw d yu knw all that?
A: Yu knw I'm preparing fr a presentatin(发布会), s I've lked up a lt f material.
B: Well, I'm sure yur presentatin will g really well.
A: Thank yu.
参考答案
1．jumping 2．themselves 3．nrmal/cmmn 4．accept 5．prblem 6．Besides 7．senses 8．hw 9．begin/start 10．wrks/helps
1．根据“like a mnkey…frm thught t thught”可知是指就像一个猴子，在想法之间跳跃。jump“跳跃”，此处like的宾语是“a mnkey”，因此后接现在分词短语作定语。故填jumping。
2．根据“Nwadays peple are easily distracted”以及“Many peple get mad with…fr having s many thughts.”可知是指因为有这么多想法而生自己的气。Many peple作主语，需用反身代词themselves“他们自己”。故填themselves。
3．根据“because humans have arund 6,000 thughts per day”可知这种感觉很常见，nrmal“正常的”/cmmn“普遍的”都符合，故填nrmal/cmmn。
4．根据“make friends with yur mnkey mind”可知是指接受它，祈使句用动词原形，accept“接受”，故填accept。
5．根据“Perhaps it can remind yu t be curius and kind twards yur mind.”以及“Nwadays peple are easily distracted”可知此处是指如果你的猴子思维不是问题，空前有a，需用单数prblem“问题”，故填prblem。
6．根据“what else”可知是指除此之外，Besides“除……之外”，故填Besides。
7．根据“watching a flwer, listening clsely t the birds, smelling the air r taking deep breaths”可知是指运用你的感官，senses“感官”，复数表泛指，故填senses。
8．根据“Ntice…yur thughts and feelings change”可知是指注意你的想法和感觉是如何变化的。hw“怎样”，故填hw。
9．根据“When ur mind is calm, we can…ur wrk again.”可知是指我们就可以重新开始工作了。begin/start“开始”，情态动词can后接动词原形。故填begin/start。
10．根据“Try drawing, reading, playing chess r else”可知是指尝试不同的事，看看哪个会起作用/有帮助。时态为一般现在时，主语是what，看作单数，谓语动词用三单形式。wrks“奏效”/helps“帮助”都符合。故填wrks/helps。
11．ancient 12．really 13．accident 14．then 15．reprted 16．must 17．prves/shws 18．glden/gld 19．prud 20．mdern
11．根据“ f Sng Dynasty was discvered in the Sichuan Nrmal University”可知，此处指在四川师范大学发现的宋代古墓，ancient表示“古代的”。故填ancient。
12．根据“ have n idea at all. Tell me what happened.”可知，此处表示惊讶，“really?”表示“真的吗？”。故填really。
13．根据“On March 19, 2021, sme wrkers fund 8 pttery figurines they were digging a sewer in the university.”可知，此处指工人们偶然发现，by accident表示“偶然地，意外地”，固定用法。故填accident。
14．根据“They immediately stpped digging the plice.”可知，此处问工人发现了之后做了什么，then表示“然后”，符合语境。故填then。
15．根据“t the plice”可知，此处指报警，reprt t the plice表示“报警”，由“stpped”可知时态为一般过去时，此处填动词过去式。故填reprted。
16．根据“And the students excited abut it.”可知，此处猜测那里的学生一定很兴奋，表示肯定猜测，用情态动词must。故填must。
17．根据“ that Chengdu has a lng histry.”可知，此处指古墓的发现再次表明了成都有悠久的历史，prve表示“证明”，shw表示“表明”，符合语境；时态为一般现在时，“It”为第三人称单数，此处填动词第三人称单数形式。故填prves/shws。
18．根据“It reminds me f the new discveries in Sanxingdui Ruins site.”可知，此处指在三星堆遗址中发现的黄金面具，glden/gld表示“金色的”。故填glden/gld。
19．根据“I’m being brn and grwing up in Chengdu.”可知，此处指因为在成都出生和长大而感到骄傲，be prud f表示“为……感到骄傲”，固定搭配。故填prud。
20．根据“mre and mre tall buildings and big cmpanies were seen in the lvely city t”可知，此处指成都是一座现代化的城市，mdern表示“现代的”。故填mdern。
21．cmmn/ppular 22．widely 23．leaves 24．Activities 25．sunds/seems 26．farming 27．experience/enjy 28．relaxed 29．advantages 30．take
21．句意：桑葚在成都常见/受欢迎吗？根据“Yes, there are a lt every May.”可知，每年五月都有很多桑葚，所以桑葚在成都很常见/受欢迎，cmmn“常见的”/ppular“受欢迎的”，在句中作表语，故填cmmn/ppular。
22．句意：早在2000年前，成都的丝绸就闻名遐迩。根据“Silk frm Chengdu became early as 2,000 years ag.”可知，早在2000年前，成都的丝绸就闻名遐迩，widely“普遍地，广泛地”，在句中修饰动词，故填widely。
23．句意：桑叶是蚕的主要食物。根据“And the main fd fr silkwrms.”可知，桑叶是蚕的主要食物，leaves“叶子”，在句中作主语，故填leaves。
24．句意：摘桑、养蚕等活动在五月很热门。根据“like picking mulberries and feeding silkwrms”可知，这些都是活动，activities“活动”，在句中作主语，句首需大写首字母，故填Activities。
25．句意：生态公园听起来/似乎是个不错的地方。根据“The eclgical a great place.”可知，生态公园听起来/似乎是个不错的地方，sunds“听起来”/seems“似乎”，在句中作谓语，故填sunds/seems。
26．句意：通过这种方式，你可以学到更多关于农业的知识。根据“Yu can rent a piece f land and grw crps r vegetables.”可知，种庄稼或蔬菜帮助了解农业，farming“农业”，在句中作宾语，故填farming。
27．句意：那是体验/享受农场生活的好方法。根据“That’s a gd way life n the farm.”可知，是体验/享受农场生活的好方法，experience“体验”/enjy“享受”，用于不定式结构中，故填experience/enjy。
28．句意：它可以帮助你忘记生活中的压力，感到轻松。根据“It may help yu frget the pressure in life and feel...”可知，农场生活帮助你放松，relaxed“放松的”，在句中作表语，故填relaxed。
29．句意：它有很多优点。根据“It has many...”和上下文可知，有很多优点、好处，advantages“优点、好处”，在句中作宾语，故填advantages。
30．句意：这个周末你能带我去吗？根据“Culd there this weekend?”可知，请对方带自己周末去公园，take“带”，情态动词后用动词原形，故填take。
31．different 32．exact 33．translated 34．spending 35．eating 36．creating 37．secret 38．ppular 39．what 40．little
31．句意：它是如此不同。根据“The prnunciatin f ‘hygge’ is /ˈhügə/.”以及“Is it an English wrd?”可知它发音不同，用形容词different“不同的”作表语。故填different。
32．句意：根据《牛津词典》的说法，没有一个英语单词可以准确地表达这个词的意思。根据“It might be…int ‘cmfrt’ in English, but it is mre than that.”可知是指没有一个英语单词可以准确地表达这个词的意思，此处表示确切的意思，exact“确切的”形容词。故填exact。
33．句意：在英语中它可能被翻译为“cmfrt”，但它远远不止于此。根据“It might be…int ‘cmfrt’ in English”可知空处表示翻译，translate“翻译”，动词，主语it与“翻译”之间存在被动关系，因此这里是被动语态，be动词后跟动词的过去分词。故填translated。
34．句意：起初，Hygge被用来描述度过漫长而寒冷的冬日的方式，因为每天可能有长达17个小时的黑暗。根据“the way f…lng and cld winter days”可知是指度过漫长而寒冷的冬日的方式，spend“度过”，空前是介词f，用动名词形式。故填spending。
35．句意：因此，人们在吃饭或喝热饮上花的时间更多。根据“n a meal”可知是指在吃饭上，eat“吃”，spend ding sth.“花费……做某事”，故填eating。
36．句意：点燃蜡烛是创造“hygge”情境的最重要部分。根据“part f…a situatin f ‘hygge’”可知是指点燃蜡烛是创造“hygge”情境的最重要部分，creat“创造”，空前是介词f，后接动名词形式。故填creating。
37．句意：难怪丹麦人的生活比其他许多国家的人幸福，因为他们知道幸福的秘诀——“hygge”。根据“they knw the…t happiness—‘hygge’”可知是指幸福的秘诀——“hygge”，secret“秘诀”，此处秘诀指“hygge”，因此用单数形式，故填secret。
38．句意：现在，“hygge”的概念正在向国外扩展，并在其他一些国家也变得流行起来。根据“becming…in sme ther cuntries”可知是指在其他一些国家也变得流行起来，ppular“流行的”，故填ppular。
39．句意：世界其他地方似乎正在慢慢地意识到丹麦人多年来一直明智地做的事情。空处引导宾语从句，且作从句宾语，用what，故填what。
40．句意：我认为我们可以通过在生活中的小事中找到快乐来实践“hygge”的方式。根据上文讲述关于“hygge”的内容，可知此处表示小事情，little“小的”，故填little。
41．be 42．everyne/everybdy 43．scientists 44．attentin 45．enables 46．pass 47．bigger
48．calling 49．dangerus 50．message
41．根据“there stp”可知是应该停止，是结构there shuld be“应该有”。故填be。
42．根据“ And scientists have still been wrking...”可知有些科学家还在研究，所以不是每个人都同意停止研究，everyne/everybdy“每个人”。故填everyne/everybdy。
43．根据“scientists have still been wrking t imprve AI mdels, mainly by training the mdels n larger and larger cllectins f infrmatin. achieving sme successes.”可知科学家正在改进人工智能模型，那些科学家现在正取得成功，scientist“科学家”，此处用名词复数。故填scientists。
44．根据“the AI tl that’s gtten the mst...”可知是得到最多的关注的人工智能工具是ChatGPT，attentin“关注”。故填attentin。
45．根据“users t ‘chat’ with a pwerful LLM”可知ChatGPT使用户能够通过强大的LLM聊天，enable“使能够”，句子用一般现在时，主语是ChatGPT，谓语动词用单数。故填enables。
46．根据“tests that are difficult fr humans.”可知是通过人类难以通过的测试，pass“通过”，and前后动词形式一致，故此处用动词原形。故填pass。
47．根据“ and mre general skills f recent AI mdels surely wrries sme peple”可知是人工智能模型的更大进步，此处用比较级bigger“更大”。故填bigger。
48．根据“many cmputer experts wrte a a six-mnty stp”可知写信呼吁停止研究人工智能工具，call fr“呼吁”，句中有谓语动词wrte，此处letter和call fr是主动关系，用现在分词作定语。故填calling。
49．根据“They mainly want gvernments t develp laws t make sure AI tls wn’t becme”可知制定法律，以确保人工智能工具不会变得危险，dangerus“危险的”。故填dangerus。
50．根据“the letter has sent a many peple—including leaders—will be thinking abut carefully”可知这封信传递了一个信息，很多人都要考虑这个信息，message“信息”。故填message。
51．shared/psted 52．appearance 53．recently 54．cause 55．cnsidered 56．cmmn 57．reflected 58．directins 59．physical 60．predictins
51．根据前文“Of curse, Jenny.”可知，李雷看到了日晕，后面应讲李雷看到的原因是很多人在微信上分享了图片。因此应填动词share，或者同义词“发布”即“pst”，根据语境可知应是一般过去时，因此动词要变为过去式。故填shared/psted。
52．根据“the”和“f”可知，此处应用名词，根据句意可知应是“日晕的出现”，因此用“appearance”。故填appearance。
53．根据句子结构可知此处缺时间状语，而且句子用了现在完成时，结合句意可知此处应表示“近期，日晕出现了好几次”，因此用副词“recently”。故填recently。
54．根据句子结构和“will”可知，此处应填动词原形，根据前句“S, many peple think there will be t much rain this summer”可知，此处应表示“太多的雨水会引起洪水”，因此用动词“cause”。故填cause。
55．根据句意可知此处应用短语“be cnsidered as”表示“被当作下雨标志的日晕”。故填cnsidered。
56．根据上文“can be seen in many places in different times”可知日晕是一种普通的自然现象，因此此处用形容词“cmmn”修饰“natural phenmenn”。故填cmmn。
57．根据前文“When sunlight hits the ice crystals(冰晶) which are like mirrrs in the sky”表达的含义“当太阳光照像镜子一样的冰晶上时”，光应该是被“反射”，因此用单词“reflect”，此处为被动语态，因此要变为过去分词“reflected”。故填reflected。
58．根据前文可知，光被反射后应会照射到不同的方向，因此用名词“directin”，前面有“different”，因此要变复数。故填directins。
59．根据前文“yu shuld study physics really hard nw”结合解释可知，日晕只是一种“物理现象”，因此用形容词“physical”修饰名词“phenmenn”。故填physical。
60．根据前文可知人们根据日晕预测天气，因此此处应表达“只是一种自然现象，而不能用来做预测”，根据空前的“make”可知此处应填名词“predictin”表示“做出预测”，前面没有冠词，因此需用复数形式表示一类。故填predictins。
61．inventr 62．knwledge 63．uses 64．warm 65．seen 66．prtect 67．nthing 68．even 69．yet 70．expert
61．句意：上次我们谈到了纸的历史和发明者。根据后文的“Oh, yes! I remembered it was a Chinese wh first invented it 2,000 years ag. ”可知，应该是讨论了纸的历史和发明者，名词inventr意为“发明者”，故填inventr。
62．句意：因为它提供了一种与知识交流的重要途径。根据前面的“It's used fr bks, which I think is the mst imprtant”可知，应该是提供了和知识交流的途径，knwledge意为“知识”，故填knwledge。
63．句意：你知道纸张的其他用途吗？根据后文的“There are many ther uses”可知，应该是你知道纸张的其他用途吗，use意为“使用”，ther后面接可数名词复数，故填uses。
64．句意：纸有让你保持温暖的优良性能。根据所在位置可知，应该填形容词作宾补，由后文的“It's very cld in Finland. It's smetimes -40°C. The farmers wear paper bts in the snw”可知，纸可以保暖，warm意为“暖和的”，故填warm。
65．句意：你也许看见过无家可归的人睡在大量的报纸上。根据答句“Yes, I have”可知，have在这里是助动词，所以时态是现在完成时，应该填动词的过去分词，由所给空后面的“hmeless peple sleeping n a large number f newspapers”可知，应该是你也许看见过无家可归的人睡在大量的报纸上，see“看见”过去分词是seen，故填seen。
66．句意：所以它们能保护他们免遭寒冷。根据上文的“hmeless peple sleeping n a large number f newspapers”可知，应该是保护他们免遭寒冷，prtect意为“保护”，故填prtect。
67．句意：没有什么能更暖和了。根据前文的“It's very cld in Finland. It's smetimes -40°C. The farmers wear paper bts in the snw”和后面的“culd be warmer”以及固定句型“否定词+形容词比较级”表示最高级含义可知，应该是没什么能更暖和了，用否定词nthing表示“没有什么”，故填nthing。
68．句意：甚至床都可以用纸做。根据前面的“But nw we hear that chairs, tables”和后面的“beds can be made f paper”并结合前后语境可知，空缺处是要加强语气，甚至连床都可以用纸做，even意为“甚至”，故填even。
69．句意：人们已经造了纸船，但还没有造纸飞机或汽车。根据句子“Peple have made paper bats, but they haven't made paper planes r cars”不缺少成分，所以要填入的是修饰成分，本句时态是现在完成时的否定句，与现在完成时连用的副词yet“还”，用在否定句中，故填yet。
70．句意：你真是一位纸张方面的专家。此处应填名词作表语；根据“Hw d yu knw all that?”和回答“Yu knw I'm preparing fr a presentatin(发布会), s I've lked up a lt f material.”可知，对方查阅了很多相关资料对纸有很深入的了解，对某方面有深入了解的人，习惯上称之为专家；expert意为“专家”，由an可知，此处用单数名词。故填expert。