2026届高三英语二轮专题复习课件第3部分专题2语法填空考法1第2讲提示词为名词、代词、形容词、副词或数词

这是一份2026届高三英语二轮专题复习课件第3部分专题2语法填空考法1第2讲提示词为名词、代词、形容词、副词或数词，共76页。PPT课件主要包含了专题二　语法填空，高频考点　研析透，模拟精练　提考能，考点１，考点２，考点３，考点４等内容，欢迎下载使用。
考法一　有提示词类第2讲　提示词为名词、代词、形容词、副词或数词
名词单复数、所有格和派生
●辨明题类所给提示词是名词时，通常考查可数名词的单数变复数，名词所有格或者名词派生为形容词、副词或动词。
●技法点拨1．若提示词是可数名词单数，分析句子成分后发现词性不需要改变，此时应考虑填名词的复数。若有以下情况考虑名词复数：①有数词或 these，thse，several，many，all，bth，varius，numerus等词修饰时用名词复数形式。②名词前有ne f时用名词复数形式。③若谓语动词是复数形式，且空处作主语，则空处应填名词复数形式。
(2025·广东省茂名市高三一模)Many f the (patient), including a lt f yung peple, were cming fr sanfutie (三伏贴)．【答案】　patients【解析】　考查名词的数。patient为可数名词，前有many，应用复数形式。
2．提示词与其后的名词是所属关系，应考虑名词的所有格。(2025·河南省五市联考高三一模)S a jurney t Suzhu isn't just a physical trip, and it als benefits a (persn) heart and sul.【答案】　persn's【解析】　考查名词所有格。空处为名词的所有格形式，意为“一个人的”。
3．分析句子结构，发现需要改变词性，则考虑派生成形容词、副词或者动词。(2025·黑龙江省示范性高中专业委员会高三一模)Once an rdinary pawnshp emplyee in the US, in 2022, Kale encuntered a rather _________ (mystery) custmer bringing a weathered album t the shp.【答案】　mysterius【解析】　考查形容词。空格处用形容词作定语，修饰名词custmer，mystery的形容词形式是mysterius，意为“神秘的”。
●真题体验1．(2025·北京卷)It's (peace), especially arund sunset.【答案】　peaceful【解析】　考查形容词。is后接形容词作表语，peace的形容词形式是peaceful，意为“宁静的”。
2．(2025·全国Ⅱ卷)Yet nw, I live in the cuntryside f Zhejiang, China with my Chinese husband and his family, where bamb and tea bushes(灌木) grw wild in the muntains, chickens are always free-range, and __________ (center) heating desn't exist.【答案】　central【解析】　考查形容词。本空修饰名词heating，应用形容词central“中央的，中心的”，作定语。
3．(2025·全国Ⅱ卷)The sun-dried clthes smell especially pleasant where I live, thanks t the absence(absent) f smg and plenty f blue sky (afternn) with lts f fresh air.【答案】　afternns【解析】　考查名词的数。afternn是可数名词，此处指不止一个下午，应用复数形式。
4．(2025·全国Ⅰ卷)Tu says that the balance between the black and white pieces, the beauty in the (strategy) placement f the pieces, and the energy flw fllwing each mve inspired artists t create il paintings, sculptures, digitally(digital) generated pictures and silk-screen prints fr the exhibitin.【答案】　strategic/strategical【解析】　考查形容词。句意：屠宁宁说，黑白棋子之间的平衡，棋子在策略布局上的美感，以及每一步棋所蕴含的能量流动，都激发了艺术家们为展览创作油画、雕塑、数字生成的图片和丝网版画。此处修饰名词placement，需用形容词strategic或者strategical“战略性的，策略的”，作定语。
5．(2025·浙江1月卷)As peple nw chse t wear mre clthes fewer (time), clthing rental services have becme increasingly ppular.【答案】　times【解析】　考查名词。句意：由于人们现在选择少穿的衣服更多了，服装租赁服务越来越受欢迎。time表示“次数”时是可数名词，fewer修饰可数名词复数形式。
6．(2025·浙江1月卷)“I really want t make this wrk fr (peple) lives tday, and I knw that desn't always mean returning(return) a dress n the Mnday after a special weekend，” she says.【答案】　peple's【解析】　考查名词所有格。句意：我真的想让这个(服装租赁服务)适合如今人们的生活，我知道这并不总是意味着在一个特别的周末后的周一归还礼服。提示词修饰名词lives，需用名词所有格，作定语。
7．(2024·全国甲卷)They are (treasure) f American heritage (遗产)．【答案】　treasures【解析】　考查名词的数。treasure表示“宝藏”，为可数名词，结合前文they are，应用复数形式。
8．(2024·新课标Ⅱ卷)Althugh they culd never have met, there are cmmn (theme) in their wrks, said Paul Edmndsn, head f research fr the Shakespeare Birthplace Trust.【答案】　themes【解析】　考查名词的数。本句为there be句型，为倒装句，根据谓语动词are可判断，本句主语为名词的复数形式。
9．(2024·新课标Ⅰ卷)These plants included mdern Western ________ (favurite) such as rsemary, lavender and fennel.【答案】　favurites【解析】　考查名词的数。favurite是可数名词，意为“特别受喜爱的东西”，根据空后“such as rsemary, lavender and fennel”可知，空处应用名词的复数形式。
10．(2024·新课标Ⅰ卷)The latest engineering (engineer) techniques are applied t create this prtective (functin) structure that is als beautiful.【答案】　functinal【解析】　考查形容词。空处修饰名词structure，应用形容词作定语。
11．(2023·全国甲卷) (difference) frm traditinal fables, Carsn's stry ends with an accusatin instead f a mral.【答案】　Different【解析】　考查形容词。be different frm...“与……不同”，所以用形容词作状语。
12．(2023·全国乙卷)But fr all its ancient buildings, Beijing is als a place which/that welcmes the fast-paced develpment f mdern life, with 21st-century architectural (wnder) standing side by side with histrical buildings f the past.【答案】　wnders【解析】　考查名词的数。根据“histrical buildings f the past”可知，空处为名词的复数形式。
13．(2023·全国乙卷)The (remark) develpment f this city, which is cnsciusly designed t prtect the past while stepping int the mdern wrld, means (mean) there is always smething new t discver here, and I culd be phtgraphing Beijing fr the next 50 years.【答案】　remarkable【解析】　考查形容词。空处为形容词修饰“develpment f this city”。
14．(2023·新课标Ⅰ卷)Xia lng ba (sup dumplings), thse amazing cnstructins f delicate dumpling wrappers, encasing ht, (taste) sup and sweet, fresh meat, are far and away my favrite Chinese street fd.【答案】　tasty【解析】　考查形容词。修饰后面的名词sup，需用形容词tasty“美味的”作定语。
15．(2023·新课标Ⅱ卷)Since June 2017, right befre the arrival (arrive) f the tw new pandas, Meng Meng and Jia Qing, I have been helping the panda keepers at the z t feel mre cmfrtable and (cnfidence) speaking English.【答案】　cnfident【解析】　考查形容词。分析句子结构可知，空处和前文的cmfrtable并列，作并列表语，应用形容词形式。
16．(2023·新课标Ⅱ卷)They als need t be ready t give ___________ (interview) in English with internatinal jurnalists.【答案】　interviews【解析】　考查名词的数。空前是动词，所以空处应用名词形式作宾语，interview意为“采访”为可数名词，不止一段采访，应用复数形式。
17．(2023·浙江1月卷)The hutngs they frmed were rderly, lined by (space)hmes and walled gardens.【答案】　spacius【解析】　考查形容词。空处需用形容词作定语，修饰空后的名词hmes。
18．(2023·浙江1月卷)Thanks t Beijing's lng histry as capital f China, almst every hutng has its stries, and sme are even assciated with histric (event)．【答案】　events【解析】　考查名词的数。根据空前的形容词histric可知，空处需用名词，且event为可数名词，应用复数形式。
形容词、副词的比较等级和派生
●辨明题类当提示词为形容词或副词时，需考虑是否是考查比较级、最高级，形容词和副词之间的相互转换或者反义词。当提示词为形容词时，还要考虑是否需要转换为名词或者动词形式。
●技法点拨1．提示词为形容词或副词，分析句子成分不需要词性转换，则考虑比较级或最高级。(2025·广东省大湾区高三一模)Many imprtant ancient buildings, like the ryal cmplexes in the past dynasties, were psitined in line with a nrth-suth directin while (imprtant) structures were generally built n the east and west sides f the main buildings.【答案】　less imprtant
【解析】　考查形容词的比较级。根据“structures were generally built n the east and west sides f the main buildings”可知，一般建在主体建筑的东西两侧的建筑都是不太重要的，应用less imprtant表示“不太重要的”，作定语。
2．提示词是形容词，分析句子成分需要词性转换，则考虑派生为副词、名词或动词。(2025·江西省重点中学盟校联考高三二模)Funded in 1974, the Dutch assciatin cncentrates n the Wng Shun-Leung lineage(世系) f Wing Chun, which emphasizes (efficient) and directness.【答案】　efficiency【解析】　考查名词。提示词作及物动词emphasize的宾语，用名词efficiency，意为“效率”，不可数名词。
●真题体验1．(2025·全国Ⅰ卷)Tu says that the balance between the black and white pieces, the beauty in the strategic/strategical(strategy) placement f the pieces, and the energy flw fllwing each mve inspired artists t create il paintings, sculptures, (digital) generated pictures and silk-screen prints fr the exhibitin.【答案】　digitally【解析】　考查副词。此处修饰形容词generated，需用副词digitally“数字地”，作状语。
2．(2025·全国Ⅱ卷)The sun-dried clthes smell especially pleasant where I live, thanks t the (absent) f smg and plenty f blue sky afternns(afternn) with lts f fresh air.【答案】　absence【解析】　考查名词。句意：我真的想让这个(服装租赁服务)适合如今人们的生活，我知道这并不总是意味着在一个特别的周末后的周一归还礼服。本空作thanks t的宾语，应用名词absence“缺乏，没有”，不可数名词。
3．(2025·北京卷)Maybe this mrning yu debated whether t get up r stay in bed slightly (lng)．【答案】　lnger【解析】　考查比较级。此处表示“多睡一会儿”，应用比较级lnger，表示“更久”。
4．(2024·新课标Ⅰ卷)The Glasshuse stands as a great achievement in cntemprary design, t huse the plants f the suthwestern part f China at the end f a path retracing (追溯) the steps alng the Silk Rute which/that brught the plants frm their native habitat in Asia t cme t define much f the (rich) f gardening in England.【答案】　richness【解析】　考查名词。冠词修饰名词，应用名词形式richness，作介词f的宾语。
5．(2024·新课标Ⅱ卷)Thse cultural elements have increased Stratfrd's internatinal (visible), said Edmndsn, adding that visitrs walking thrugh the Birthplace Garden were ften amazed t find (find)the cnnectin between the tw great writers.【答案】　visibility【解析】　考查名词。形容词internatinal后接名词形式，visibility为不可数名词作宾语。
6．(2024·全国甲卷)They all agreed and vwed (承诺) t prmte the idea at the (cmplete) f their jurney.【答案】　cmpletin【解析】　考查名词。冠词修饰名词，本空应用名词作宾语，cmplete名词形式为cmpletin，不可数。
7．(2024·全国甲卷)Yellwstne was the (large) United States natinal park—2.2 millin acres—until Wrangell-Saint Elias in suthern Alaska, which became a natinal mnument in 1978, tk the hnrs as a natinal park in 1980 with 12.3 millin acres.【答案】　largest【解析】　考查形容词最高级。本空前有the，为形容词最高级标志词，用large的最高级largest作定语。
8．(2023·浙江1月卷)The term “hutng”， (riginal) meaning “water well” in Mnglian, appeared first during the Yuan Dynasty.【答案】　riginally【解析】　考查副词。空处修饰动词meaning需用副词形式。
9．(2023·浙江1月卷)Their siheyuan were far smaller in scale and _____ (simple) in design and decratin, and the hutngs were narrwer.【答案】　simpler【解析】　考查形容词比较级。根据句子结构和and可知，空处需用形容词比较级和前面的smaller构成并列结构作表语。
10．(2023·新课标Ⅱ卷) (basic), hw t describe a panda's life.【答案】　Basically【解析】　考查副词。空处修饰空后整个句子，应该用副词修饰，basic的副词形式是basically，位于句首，首字母应大写。
11．(2023·新课标Ⅰ卷)N matter where I buy them, ne steamer is (rare) enugh, yet tw seems greedy, s I am always left wanting (want) mre next time.【答案】　rarely【解析】　考查副词。修饰形容词用副词作状语。
人称代词、物主代词、反身代词
●辨明题类所给提示词是代词时，一般考查人称代词变为物主代词。有时需考虑人称代词单数变复数、主格变为宾格、人称代词变为反身代词等。
●技法点拨1．提示词为代词，分析句子成分所填词若作介词或者动词的宾语，则考虑人称代词的宾格；若与主语是同一人，则考虑反身代词。(2025·四川省巴中市高三一模)The game is remarkably stunning, which features breathtaking landscapes and ancient legends that allw players t immerse (they) in a fantastical Eastern wrld.【答案】　themselves【解析】　考查代词。immerse neself in为固定短语，意为“沉浸于”，主语是players，其反身代词为themselves。
2．提示词为代词，分析句子成分所填词若作名词的定语，则考虑物主代词。(2025·河北省邢台市名校协作高三一模)Arund 1,000 peple frm varius cultural backgrunds made (they) way t the cncert despite the incnvenience brught by the winter strm in New Yrk.【答案】　their【解析】　考查代词。根据空格后的名词way可知，空格处应该用形容词性物主代词their作定语，修饰名词way，make ne's way t“前往某处”是固定搭配。
●真题体验1．(2025·全国Ⅱ卷)Over time, I've fund (I) feeling extremely at hme here.【答案】　myself【解析】　考查反身代词。句意：随着时间的推移，我发现自己在这里有了宾至如归的感觉。本空指代主语I，表示“我自己”，应用反身代词。
2．(2024·全国甲卷)This area, with (it) unique and breathtaking natural beauty, must be well preserved fr all peple f the natin t enjy—as a natinal park.【答案】　its【解析】　考查代词。修饰名词beauty用形容词性物主代词。
3．(2024·浙江1月卷)Wh knws, perhaps sme f the mre frward-lking (ne) may yet cme ut with a whle range f “just fr yu” pack sizes with special ffers as well.【答案】　nes【解析】　考查代词。代词ne意为“一个人”，在sme f后应用复数形式。
4．(2023·新课标Ⅰ卷)Nanxiang aside, the best Xia lng ba have a fine skin, allwing them t be lifted (lift) ut f the steamer basket withut allwing them tearing r spilling any f (they) cntents.【答案】　their【解析】　考查代词。修饰后面的名词cntents需用形容词性物主代词。
●辨明题类所给提示词是数词时，经常考查序数词，有时考查年龄的表达法“在某人几十多岁时”(用“in ne's ＋整十基数词的复数”，如：in ne's fifties在某人五十多岁时)或年代的表达法“在几十年代”(用“in the＋整十基数词的复数”，如：in the thirties在三十年代)。
●技法点拨提示词为数词，如果强调顺序，则考虑用序数词形式。将基数词变为序数词时，一般由基数词加-th构成，如：six→sixth，hundred→hundredth；以y结尾的基数词变为序数词时，先把y变为ie，再加-th，如：twenty→twentieth；还有不规则变化：ne→first，tw→secnd，three→third，five→fifth，eight→eighth，nine→ninth，twelve→twelfth。(2025·内蒙古阿拉善盟高三一模)Fr electric cars, parking is free fr the (ne) tw hurs at public parking lts.【答案】　first【解析】　考查序数词。此处表示“前两个小时”，应用序数词。
●真题体验(2023·全国甲卷)Fables were part f the ral traditin f many early cultures, and the well-knwn Aesp's fables date t the (six) centuryB.C.【答案】　sixth【解析】　考查数词。century前面要用序数词形式。
A(2025·江西省萍乡市高三一模)Eaten away by time and cvered in dust, Chinese ancient bks describe the histry f Chinese civilizatin.Nw China has prmised t make full use 1.　　　　 them, rather than leaving them sleeping in archives(档案)．On Friday, under an initiative 2.　　　　(lead) by the Natinal Library f China in Beijing, key 3.　　　　(library) arund the cuntry released digital versins f 7,085 ancient bks nline fr free public use.
This was the 9th 4.　　　(expand) f the natinal nline netwrk knwn as the Chinese Ancient Bk Resurces Database.The number f digitized cpies n the platfrm stands at 105,000, with the Natinal Library 5.　　　　(cntribute)1,024 bks, including 274 listed as rare editins.A print editin f the Shiji (Recrds f the Grand Histrian), which 6. (publish) in 1171, is ne such example.Written in the 1st century BC by Sima Qian, it's a fundatin text f Chinese histry.A precius Nrthern Sng perid (960－1127) editin f the Huhanshu (Bk f Later Han), 7. is abut the histry f the Eastern Han Dynasty (24－220), is included as well.Due t age, nt t many Nrthern Sng bks were lucky enugh 8. (survive) and nly three bks in the cllectin f the natinal library, including the Huhanshu, can be 9.　　　　(definite) credited t the perid.
“10.　　　　 are in great demand fr academics are digitized versins f ancient bks，” Zhang Zhiqing, leader f the Natinal Library f China, said.“Referring t riginal cpies is crucial t the study f literature if researchers are t avid mistakes frm using secndary surces.”【语篇解读】　本文是一篇说明文。文章主要介绍了中国国家图书馆牵头，全国主要图书馆免费发布古籍数字版，满足学术需求。
1．f　考查固定短语。make full use f是固定短语，意为“充分利用”。2．led　考查非谓语动词。分析句子结构可知，此处为非谓语动词作后置定语修饰an initiative，an initiative与lead之间是被动关系，即“倡议是被中国国家图书馆发起的”，所以用过去分词作后置定语。3．libraries　考查名词的数。根据arund the cuntry可知，此处指全国各地的主要图书馆，library是可数名词，应用复数形式。4．expansin　考查名词。根据the 9th可知，此处需要一个名词，expand的名词形式是expansin，意为“扩展；扩充”。
5．cntributing　考查非谓语动词。此处是“with＋宾语＋宾语补足语” 的复合结构，the Natinal Library与cntribute之间是主动关系，所以用现在分词作宾语补足语。6．was published　考查时态、语态和主谓一致。根据in 1171可知，句子时态为一般过去时，A print editin f the Shiji (Recrds f the Grand Histrian)与publish之间是被动关系，即“《史记》的印刷版被出版”，所以用一般过去时的被动语态。
7．which　考查定语从句。分析句子结构可知，设空处引导非限制性定语从句，先行词A precius Nrthern Sng perid (960—1127) editin f the Huhanshu (Bk f Later Han)指物，在从句中作主语，所以用关系代词which引导。8．t survive　考查非谓语动词。“be＋形容词＋enugh＋t d sth.”是固定结构，意为“足够……去做某事”，所以此处应用动词不定式作原因状语。
9．definitely　考查副词。由副词修饰动词可知，此处应用副词修饰动词credited，definite的副词形式是definitely，意为“肯定地；确切地”。10．What　考查名词性从句。分析句子结构可知，10. are in great demand fr academics是主语从句，从句中缺少主语，指物，所以用连接代词 What引导主语从句。
B(2025·浙江省台州市高三二模)Fr s many years, ur wrld has perated in a set cycle：wrk, earn mney, spend it, and repeat.In the prcess, 1.　　　　 accumulatin f unnecessary items will quickly lse their appeal and end up gathering dust.Hwever, a pwerful shift twards sustainability is nw underway.The sharing ecnmy, all abut bnding peple and resurces, 2. . 　　　　(becme) very ppular in Eurpe during the past decades.
In Germany, 3.　　　　(drive) by the cuntry's strng envirnmental cnsciusness and cmmitment t sustainability, the sharing ecnmy has been embraced, giving rise t numerus platfrms and services.Fr example, sme ppular car-platfrms like Drivy shwcase the 4.　　　　(market) ptential fr cllabrative and waste-reducing innvatins.And this is nt just limited t businesses; it places greater emphasis 5.　　　 rdinary individuals and cmmunities.Peple are increasingly using thrift stres, dnatin statins and digital platfrms 6.　　　　(exchange) their unwanted items fr free.
One such platfrm is GHardcver, which revlutinizes bk sharing by allwing readers t easily lend and brrw bks, thus 7.　　　　(frm) a sustainable sharing cycle that reduces waste and carbn emissins.Users can create virtual 8.　　　　(bkshelf) t share their cllectins and explre ther bks frm fellw readers, 9.　　　　 makes literature mre accessible and fsters a grwing number f bk lvers.
The sharing ecnmy is creating a mre sustainable, resurce-efficient and cnnected future, where mre individual participatin will pave the way fr a 10.　　　　(bright) future.【语篇解读】　本文是一篇说明文。文章主要讲述了共享经济在欧洲的兴起及其影响。
1．an　考查冠词。an accumulatin f为固定短语，意为“……的积累”。2．has becme　考查时态和主谓一致。根据时间状语during the past decades可知，此处应用现在完成时，主语The sharing ecnmy为单数，助动词用has。3．driven　考查非谓语动词。drive在句中应用非谓语动词形式作状语，该动词与逻辑主语the sharing ecnmy构成被动关系，用过去分词作状语。
4．market's　考查名词所有格。表示“市场的潜力”，用名词所有格形式，market的所有格是market's。5．n/upn　考查介词。place emphasis n/upn为固定短语，意为“强调”。6．t exchange　考查非谓语动词。用不定式t exchange作目的状语，表示使用这些平台的目的是交换物品。7．frming　考查非谓语动词。frm在句中应用非谓语动词形式作状语。此处用现在分词作结果状语，表示自然而然的结果。
8．bkshelves　考查名词的数。bkshelf为可数名词，前文没有冠词，表示数量大于一，应用复数形式。9．which　考查定语从句。空处引导非限制性定语从句，修饰上文整个句子，从句中缺少主语，用关系代词which引导从句。10．brighter　考查比较级。根据“mre sustainable, resurce-efficient and cnnected future”可知，此处应用形容词比较级brighter，表示 “更光明的”，作定语修饰名词future。
C(2025·青海省西宁市大通县高三二模)The headwater regin f the Yangtze River, 1.　　　　(knw) as Sanjiangyuan, is like a human brain, which can influence the situatin as a whle.The eclgical envirnment f the surce area plays a crucial rle in 2.　　　　(maintain) the stability f the climate system, water resurces security, bidiversity and ecsystem security alng the Yangtze River.
In recent years, the eclgical envirnment 3.　　　　(prtect) f the Sanjiangyuan area has achieved remarkable results.Data frm Qinghai's eclgy and envirnment department shws that the water quality f the Yangtze River's mainstream in the prvince 4.　　　　(remain) in a Class-I r Class-II cnditin fr many years.
In 1976, China rganized its first scientific expeditin t the headwater regin f the Yangtze River.After vercming many hardships, the expeditin team 5.　　　　(eventual) traced(追溯) the surce f the Yangtze River t the ft f Munt Geladandng, 6.　　　　 changed the length f the Yangtze River and cnfirmed it as the 7.　　　　(three) lngest river in the wrld.
8.　　　　(gain) a deeper understanding f the changes in the eclgical envirnment in the surce area f the Yangtze River, scientists have carried ut cmprehensive scientific expeditins t the Sanjiangyuan area since 2012.At present, the expeditin has established 9.　　　　 field scientific research bservatin system, including ver 20 river bservatin sectins and pints, extending frm wetlands, glaciers and water eclgy and water envirnment evlutin, 10.　　　　 river channel evlutin, water and sand changes.
【语篇解读】　本文是一篇说明文。长江源头三江源地区生态环境至关重要。中国自1976年起多次组织科考，建立观测系统，深入研究并保护该地区。1．knwn　考查非谓语动词。句中已有谓语动词，knw需用非谓语形式。be knwn as意为“被称为”，此处用过去分词短语knwn as Sanjiangyuan作后置定语。2．maintaining　考查非谓语动词。in是介词，介词后接动词时要用动词的-ing形式(动名词)作宾语。
3．prtectin　考查名词。此处需要一个名词作句子的主语，prtect是动词，其名词形式是prtectin，the eclgical envirnment prtectin意为 “生态环境保护”。4．has remained　考查时态和主谓一致。根据fr many years可知，表示从过去持续到现在的一段时间，要用现在完成时，the water quality是不可数名词，作主语时谓语动词用单数形式。5．eventually　考查副词。traced是谓语动词，这里需要一个副词来修饰动词traced，eventual是形容词，其副词形式eventually 表示 “最终”，作状语。
6．which　考查定语从句。此处是一个非限制性定语从句，先行词是前面整个主句，在定语从句中作主语，关系代词用which，指代前面整个句子所描述的事情。7．third　考查数词。根据the和lngest可知，这里表示“第三长”，three是基数词，要用其序数词来表示顺序，the third lngest意为 “第三长的”。8．T gain　考查非谓语动词。在句中作目的状语，用动词不定式形式，置于句首的单词首字母需大写。
9．a　考查冠词。field scientific research bservatin system是可数名词单数，这里表示“一个”野外科学研究观测系统，field是以辅音音素开头的单词，所以用不定冠词a来修饰。10．t　考查介词。是固定搭配，表示 “从…… 到……”，所以用介词t。