2023年高考英语二轮复习语法专项介词突破训练作业含答案

这是一份2023年高考英语二轮复习语法专项介词突破训练作业含答案，共17页。试卷主要包含了 单句语法填空， 语篇填空等内容，欢迎下载使用。

一、 单句语法填空。
1. Mst f the villagers tk part in the Dragn Bat races 9：00
a．m. the mrning f June 18.
2. —When will the party be held?
— tw weeks' time, 15th July.
3. the car appraching the Tian'anmen Square, we saw many turists saluting t the Five­starred Red Flag.
4. mre infrmatin abut the package tur arund Peru, please cntact us turinf@travelperu.rg.
5. The sprts meeting had t be pstpned the fllwing day because
the bad weather.
6. He tried vain t persuade his father t give up smking.
7. the fact that my grandmther is already eighty years ld, she still keeps ding exercise every mrning.
8. Thugh it had passed several days, Vivian, wh was a witness the accident where tw were killed and five seriusly injured, still refused t talk abut it.
9. the end f last mnth, mst f the shps had started business.
10. The prblem is s cmplicated that it is quite pwer t slve it.
11. Dn't wrry. The runaway cw is cntrl and it wn't hurt anyne.
12. She knew that her lve was impssible but she knew als that it was
cntrl.
13. The prject was running late wing unfreseen circumstances.
14. “Speed up.70 km/h isn't fast enugh.Yu are hlding up the traffic，” rdered anther vice frm the seat next me.
15. Bb thught he culdn't g t the party because he had t write a reprt, but he went all.
16. Mst peple agreed that the newspaper was hitting the belt when it hid the truth.
17. Let's make jint effrts t prtect the envirnment and live
harmny nature.
18. I think it's unwise f yu t build up yur business the expense
yur health.
19. If yu are in favur the plan, please help us cllect sme infrmatin yur leisure.
20. —What d yu think f Tm?
— cntrast his brther, he is always cnsiderate in his treatment f thers.
21. Jane is a hurry because the bus t the airprt leaves in half an hur.
22. The little pupil tk his grandma the arm and walked her acrss the street.
23. All are welcme t jin the yga club regardless age r sex.
24. She drve s fast that the car almst went the rad.
25. additin t the schl, there is als a clinic in the village, which is als built with the supprt f the gvernment.
26. As a dctr, yu shuld be mre patient yur patients.
27. We shw great respect Mr Andersn, ur new English teacher.
28. —D yu lk n him an equal?
—Prbably nt.
29. If the answer the questin is yes, yu had better cntrl yur stress.
30. The gvernment has taken measures t bring the high prices f daily gds t keep the market stable.
二、 语篇填空。
Passage 1
Tai chi chuan r Chinese bxing, is 31. ancient and distinctive Chinese frm f exercise 32. is ppular thrughut the wrld. As exercise, tai chi chuan is designed 33. (prvide) relaxatin in the prcess f bdy­cnditining exercise and is drawn frm the principles f taiji, ntably with the harmnizing f the yin and yang, respectively the passive and active principles. It emplys flwing, rhythmic, deliberate mvements, with carefully 34.
(appint) stances(站姿) and psitins, but in practice n tw masters teach the system 35. (exact) alike. As a mde f attack and defence, tai chi chuan is prperly cnsidered a martial art, 36. (resemble) t kung fu. It may be used with r 37. weapns.
Freehand exercise t prmte health was practised in China as early as the 3rd century, and, by the 5th century, mnks f Shalin Temple were perfrming exercises 38. (imitate) the five creatures: bear, bird, deer, mnkey, and tiger. The snake was added 39. (late), and, by the early Ming Dynasty, the yin and yang principles 40. (add) t harmnize the whle. An assimilatin(同化) f these develpments, the art f tai chi chuan was systemized and named in the early Qing Dynasty.
Passage 2
One f the biggest themes at this year's CES tech shw was electric and autnmus transprtatin—cars, trucks, bikes, bats. And, it turns ut, tractrs.
Farm­equipment giant Deere shwed a new autnmus tractr with 41.
attached tillage(耕作) tl at CES. Fr thse nt familiar 42.
farm life, Julian Sanchez, Deere's directr f emerging technlgies, says that tillage is an 43. (imprtance), time­cnsuming, and tiring prcess f preparing the sil fr next seasn's planting. If yu dn't d it fast, the grund culd freeze. And 44.
(effective) tilling means sme seeds wn't take and yield(产量) 45.
(drp).
While autmatic driving has been n tractrs fr several 46. (year), Deere's autnmus tractr can perate withut a driver in the cab. The tractr can detect bstacles 47. might damage the attached tiller. And, he says, it can run arund the clck, saving time and labur, and imprving prductivity by as much as 20%.
If the tilling is t shallw, yu dn't break up the straw t deep, and the tractr mves t 48. (slw), increasing fuel csts. This system includes six cameras t detect hles, rcks, r ther materials, 49. (infrm) the farmer when an issue needs t be addressed. Eventually, Deere expects 50. (add) ther tasks t the autnmus tractr.
提高题
一、 单句语法填空。
1. I tried t call yu but I culdn't get .
2. This aging f the ppulatin is driven tw factrs.
3. Transprt cmes fairly high up in the list, with buses, planes and trains all capable driving us mad.
4. Their effrts resulted the birth f a 1985 bk, Understanding China Thrugh Cartns.
5. The citizens in Paris gathered arund the cathedral, praying the hundreds f firefighters wh fught the flames.
6. Mary sld the huse even thugh it was her husband's wish.
7. In high schl, I became curius the cmputer, and built my first website.
8. He sld r exchanged sme f the milk in the twn nearby ther fd and made cheese and butter fr the family with what was left.
9. As fr parents, nthing can be cmpared their children's physical and mental health.
10. The glbal jurney is led by an expeditin leader, Steve Mre,
memry f his father, a firefighter wh died f lung cancer at the age f 63.
二、 语篇填空。
Passage 1
Fr travellers wh used t think that Chinese farmers live in pr cnditins, the rural turs can be quite an eye pener. 11. (travel) t Jiangsu's rural villages, many f which lk like beautiful pstcard scenes, might be ttally different frm 12.
yu have imagined. A rural tur t the prvince might allw travellers t have a glance at their daily lives as well as the 13. (develp) f China's rural areas in recent years.
Lngshang village, which has 141 peple frm 51 husehlds, is 14.
(lcate) at the ft f Yuzi Muntain in Nanjing's Gachun district. It used t have ruined huses, 15. (mud) rads and annying flies everywhere. In 2017, experts 16. (invite) t design the village's landscape and help restre its ancient buildings. Nw it has becme 17. “Internet celebrity” and attracted many visitrs 18. (draw) by its tea huses, cafés and bk stres.
Als in Nanjing, Bula village in Puku district, knwn as Never Aging village, has attracted many wh are interested in finding the secret f staying yung. 19.
clean water and refreshing air, the village impresses many by its stne streets, ancient­style farm huses and varius sprts venues 20. peple can g hiking, play baseball and g fishing.
Passage 2
On July 19, 2013, a girl wh was cming t 10 signed up n Weib with the nickname “frg princess Gu Ailing，” and she has psted sme pictures f her different skiing 21. (cmpete). The nickname came frm Gu's first helmet when she started skiing, 22. was green and had a crwn and a pink hair pin n it, accrding t media reprts.
Gu first went int public view n June 6, 2019, when she 23. (annunce)
n Weib that she wuld represent Team China in the Beijing 2022 Winter Olympics. In the same mnth, Gu changed her 24. (register) natinality frm the US t China n the fficial website f the Internatinal Ski Federatin(FIS). Due t the sensitivity abut 25. (switch) natinality and lack f attentin n winter sprts, Gu did nt attract much enthusiasm in the first place.
Over the next tw years, she wn 12 gld 26. (medal) fr China. Mre and mre peple becme familiar 27. Gu, a girl wh lves t eat dumplings and Peking rast duck, 28. (particular) when they fund ut that Gu's putnghua with a Beijing accent is mre standard than their wn. And n ne in China dubted 29. (she) frm a patritic standpint. Sme have nticed that there's 30. “Chinese dragn” n Gu's sprtswear t win the gld medal.
Passage 3
Eastern China can see a sea f flwers 31. full blm in the water. Every spring, this grgeus sea f flwers attracts cuntless turists 32.
(appreciate) the beautiful scenery.
What peple see is actually a great example f Chinese intelligence. China's ancient philsphy, the harmnius 33. (interact) with nature, blms and bears fruit here. 5，000 years ag, this was a beach. 3，000 year ag, the castline mved eastward, and appeared in Xinghua area. 1，000 years ag, t prevent flds, the hard­wrking and intelligent peple in Xinghua dug a netwrk f deep ditches r streams in the swamps 34. piled up the sil n ne side, frming fields suitable fr cultivatin.
The fields' shapes and sizes vary. Big nes can be a kilmetre wide, the smaller nes just a few metres. All have ne thing in cmmn—they are surrunded by water. The fields 35. (discnnect) t each ther, lking like islets n the sea.
Fr the lcal natural cnditins, hard­wrking and intelligent lcal ancestrs 36.
(transfrm) lw­lying wetlands unsuitable fr agriculture int farmland and fields, prviding grains and vegetables fr 37. lcals. Als, these fields have maintained the riginal water currents, rivers and canals, and the surrunding natural 38. (eclgy) envirnment.
It has frmed a new landscape 39. (represent) the unity f man and nature. Tday the unique landfrm f the Xinghua Fields has becme a 40.
(glbal) imprtant agricultural heritage.
Passage 4
Wikipedia, the nline encyclpedia(百科全书), is the largest encyclpedia ever. An encyclpedia is a cllectin f infrmative articles abut 41. (variety) things. Encyclpedias used t be printed 42. bks. Nw, they are mstly fund nline.
“Wiki” is an Internet term 43. (mean) “a website that can be edited by the public”. It cmes frm “wikiwiki”， a Hawaiian wrd fr “quick”. Tw Americans, Jimmy Wales and Larry Sanger, created Wikipedia in 2001. It is nw the fifth­mst 44.
(visit) website n the Internet. It has abut 6 millin articles in 300 languages and is visited by billins f peple each day, 45. want t find infrmatin n just abut anything—science, math, languages, art, culture, and cmpany histries.
Wikipedia emplys 46. pen editing mdel. Except fr a small number f pages, anyne can edit articles, annymusly(匿名地) r with a user accunt. Editing is unpaid, althugh Wikipedia des emply a small staff. Wikipedia is 47.
(free) available t anyne with an Internet cnnectin.
Hwever, critics have raised dubts abut the accuracy and authrity f Wikipedia's cntent since its editrs are mstly amateurs rather than prfessinals. There is n dubt that many Wikipedia pages cntain errrs althugh the 48.
(rganize) des attempt t slve prblems with its cntent review system. Hwever, several studies have cncluded that Wikipedia is as accurate as mst print encyclpedias. Indeed, a 2005 reprt in the jurnal Nature 49. (find) it t be nly slightly less reliable than Encyclpedia Britannica. It is true that Wikipedia faces challenges. It carries n ads and its funds cme frm dnatins. Perhaps mre imprtantly, the number f its vlunteer editrs is shrinking.
Despite these 50. (difficulty), Jimmy Wales says he will still stick t his aspiratin—“t d smething useful fr the wrld”．
基 础 题
一、 1. at; n 2. In; n 3. With 4. Fr; at 5. until; f 6. in 7. Despite 8. t 9. By 10. beynd
11. under 12. beynd 13. t 14. t 15. after
16. belw 17. in; with 18. at; f 19. f; at
20. In; t 21. in 22. by 23. f 24. ff 25. In
26. with 27. fr 28. as 29. t 30. dwn
二、
Passage 1
31. an 32. which/that 33. t prvide 34. appinted 35. exactly 36. resemblance 37. withut 38. imitating
39. later 40. had been added

31. an 考查冠词。句意：太极拳或中国拳术是一种古老而独特的中国运动形式，在世界各地都很受欢迎。frm是可数名词，此处泛指“一种……形式”，应用不定冠词，且ancient为元音音素开头。故填an。
32. which/that 考查定语从句。句意见上题解析。“________ is ppular thrughut the wrld”是限定性定语从句，修饰“________ ancient and distinctive Chinese frm f exercise”。引导词在从句中作主语，指物，应用关系代词that或which引导。故填which/that。
33. t prvide 考查非谓语动词。句意：作为锻炼，太极拳的目的是在身体调理锻炼的过程中提供放松，它是从太极的原理中提取的，特别是阴阳的协调，分别是被动原则和主动原则。“________(prvide) relaxatin in the prcess f bdy­cnditining exercise”是目的状语，用动词不定式。故填t prvide。
34. appinted 考查非谓语动词。句意：它采用流畅、有节奏、深思熟虑的动作，以及精心指定的姿势和位置，但在实践中，没有哪两位大师教的是完全相同的体系。空处修饰“stances(站姿) and psitins”，作定语，它们之间是被动关系，故用过去分词。故填appinted。
35. exactly 考查副词。句意见上题解析。空处修饰副词alike，应用副词。exactly意为“恰好，完全”，表强调。故填exactly。
36. resemblance 考查名词。句意：作为一种进攻和防御的方式，太极拳被恰当地认为是一种武术，类似于功夫。“________(resemble) t kung fu”是定语，修饰“a martial art”。resemblance t sb/sth为固定搭配，意为“类似于某人或某物”。故填resemblance。
37. withut 考查介词。句意：它可以使用，也可以不使用武器。结合空前的r可知，空处和with相反。该句指打太极拳可以用武器，也可以不用武器。故填withut。
38. imitating 考查非谓语动词。句意：早在3世纪，中国就开始了促进健康的徒手运动；到了5世纪，少林寺的和尚们开始练习，模仿熊、鸟、鹿、猴和虎五种动物。分析句子结构可知，句子的谓语是“were perfrming”，故imitate用非谓语动词形式，作状语。imitate与逻辑主语mnks是主动关系，所以用现在分词形式。故填imitating。
39. later 考查副词。句意：蛇形是后来添加的，到明朝早期，阴阳原则被添加以协调整体。空处在句中作状语，表示“后来”，应用副词later。故填later。
40. had been added 考查动词时态和语态。句意见上题解析。add是谓语动词，与主语“the yin and yang principles”是被动关系；再结合时间状语“by the early Ming Dynasty”可知，表示“过去的过去”的动作，用过去完成时。故填had been added。
Passage 2
41. an 42. with 43. imprtant 44. ineffective
45. will drp 46. years 47. that/which 48. slwly
49. infrming 50. t add

41. an 考查冠词。句意：农业设备巨头迪尔公司(Deere)在CES上展示了一款带有耕作工具的新型自动拖拉机。此处修饰单数可数名词 tl，表示泛指，应用不定冠词，且 attached为元音音素开头。故填an。
42. with 考查介词。句意：迪尔公司新兴技术主管Julian Sanchez说，对于那些不熟悉农场生活的人，耕作是为下一季种植准备土壤的一个重要、耗时、累人的过程。be familiar with … 为固定搭配，意为“对于……熟悉”。故填with。
43. imprtant 考查形容词。句意见上题解析。空处修饰名词prcess，所以用形容词形式。故填imprtant。
44. ineffective 考查形容词。句意：无效耕作意味着一些种子无法收获，产量将下降。根据下文“sme seeds wn't take”可知，空处指的是无效耕作。空后为名词，所以空处应为形容词。故填ineffective。
45. will drp 考查时态。句意见上题解析。空处在句中作谓语，and是并列连词，前后时态一般保持一致，所以空处为一般将来时。故填will drp。
46. years 考查名词复数。句意：虽然拖拉机上的自动驾驶技术已经存在好几年了，但迪尔公司的自动驾驶拖拉机可以在没有司机的情况下运行。空前several意为“一些”，后跟可数名词复数，故空处需用复数形式。故填years。
47. that/which 考查定语从句。句意：拖拉机能探测到可能损坏所附分蘖的障碍物。分析句子结构可知，空处引导限定性定语从句，先行词是bstacles，指物，作从句的主语，应用关系代词that或which引导。故填that/which。
48. slwly 考查副词。句意：如果耕田太浅，就不能把稻草割得太深，而且拖拉机的速度太慢会增加燃料费用。空处应用副词修饰谓语动词。故填slwly。
49. infrming 考查非谓语动词。句意：该系统包括六个摄像头，用于探测洞、岩石或其他材料，当需要解决问题时通知农民。句子已有谓语动词include，所以空处用非谓语动词。空处所填单词与主语之间是逻辑上的主动关系，应用现在分词，作状语。故填infrming。
50. t add 考查非谓语动词。句意：最后，迪尔公司希望为自动拖拉机增加其他任务。expect t d sth为固定搭配，意为“期待做某事”。故填t add。
提 高 题
一、 1. thrugh 2. by 3. f 4. in 5. fr 6. against 7. abut 8. fr 9. with 10. in
二、
Passage 1
11. Travelling 12. what 13. develpment 14. lcated
15. muddy 16. were invited 17. an 18. drawn
19. Besides 20. where

11. Travelling 考查现在分词。句意：去江苏的农村旅行，其中许多看起来像美丽的明信片上的场景，可能与你想象的完全不同。分析句子结构可知，此处用动名词作主语，且句首单词首字母要大写。故填Travelling。
12. what 考查宾语从句。句意见上题解析。此处引导frm的宾语从句，从句中缺少imagined的宾语，表示“想象”。故填what。
13. develpment 考查名词。句意：到该省的乡村之旅可以让游客了解他们的日常生活以及中国农村地区近年来的发展。定冠词the后接名词形式作宾语。故填develpment。
14. lcated 考查过去分词。句意：垄上村位于南京市高淳区游子山脚下，共有51户人家141人。be lcated in为固定搭配，意为“位于”。故填lcated。
15. muddy 考查形容词。句意：那里曾经都是毁坏的房屋，泥泞的道路，到处都是令人讨厌的苍蝇。此处用形容词作定语修饰名词rads。故填muddy。
16. were invited 考查动词时态和语态。句意：2017年，专家们应邀设计该村的景观，并帮助保护其古建筑。时间状语为“In 2017”，句子用一般过去时。主语experts为复数形式，且与invite之间是被动关系。故填were invited。
17. an 考查冠词。句意：如今，它已成为“互联网名人”，吸引了许多对当地茶馆、咖啡馆和书店感兴趣的游客。根据语境可知，此处表示泛指，故用不定冠词，且Internet为元音音素开头。故填an。
18. drawn 考查过去分词。句意见上题解析。分析句子结构可知，此处为非谓语动词作定语。visitrs与draw之间是被动关系，故用过去分词作定语。故填drawn。
19. Besides 考查介词。句意：除了干净的水和清新的空气，这个村庄的石头街道、古老风格的农舍和休闲旅游景点给许多人留下了深刻印象，人们可以在这里徒步旅行、打棒球和钓鱼。besides意为“除……之外”，符合语境，且句首单词首字母要大写。故填Besides。
20. where 考查定语从句。句意见上题解析。分析句子结构可知，此处引导定语从句，先行词为the village，在从句中作地点状语。故填where。
Passage 2
21. cmpetitins 22. which 23. annunced
24. registered 25. switching 26. medals 27. with
28. particularly 29. her 30. a

21. cmpetitins 考查名词。句意：2013年7月19日，一个快10岁的女孩在微博上注册了一个账号名叫“青蛙公主谷爱凌”，她还发布了一些不同滑雪比赛的照片。根据空前的限定词her可知，空处填名词；根据different可知，空处需要用名词复数形式。故填cmpetitins。
22. which 考查定语从句。句意：据媒体报道，谷爱凌的昵称来自她开始滑雪时的第一顶头盔，它是绿色的，上面有一顶王冠和一个粉红色的发夹。本句是非限制性定语从句，先行词是helmet，关系词在从句中作主语，指物。故填which。
23. annunced 考查动词时态。句意：谷爱凌于2019年6月6日首次公开露面，当时她在微博上宣布将代表中国队参加北京2022年冬奥会。本句是when引导的定语从句，指代“June 6, 2019”，因此从句要用一般过去时。故填annunced。
24. registered 考查非谓语动词。句意：在同一个月，谷爱凌在国际滑雪联合会(FIS)的官方网站上将她的注册国籍从美国改为中国。句中register是非谓语动词做定语，修饰natinality。“国籍”和“注册”是被动关系，所以应用过去分词作定语。故填registered。
25. switching 考查非谓语动词。句意：由于对国籍转换的敏感，以及对冬季运动缺乏关注，谷爱凌一开始并没有激起太多的热情。句中switch作介词abut的宾语，因此用现在分词形式。故填switching。
26. medals 考查名词复数。句意：在接下来的两年中，她为中国赢得了12枚金牌。根据空前的12可知，此处需要用复数名词。故填medals。
27. with 考查介词。句意：越来越多的人开始熟悉谷爱凌，一个喜欢吃饺子和北京烤鸭的女孩，尤其是当他们发现谷爱凌的北京话比他们的更标准。be familiar with … 为固定搭配，意为“对……熟悉”。故填with。
28. particularly 考查副词。句意见上题解析。空处修饰when引导的时间状语从句，因此用副词。故填particularly。
29. her 考查代词。句意：没有一个中国人怀疑她爱不爱国。dubt是及物动词，后接代词的宾格形式。故填her。
30. a 考查冠词。句意：一些人注意到，在获得金牌时，谷爱凌的运动服上有一条“中国龙”。Chinese dragn在文中第一次出现，且是单数名词，因此用不定冠词表泛指，且Chinese首字母的发音为辅音音素。故填a。
Passage 3
31. in 32. t appreciate 33. interactin 34. and
35. are discnnected 36. transfrmed 37. the
38. eclgical 39. representing 40. glbally

31. in 考查介词。句意：中国东部可以看到水中盛开的花海。in full blm为固定搭配，意为“正在开花；全开；怒放”。故填in。
32. t appreciate 考查非谓语动词。句意：每年春天，这片绚丽的花海都会吸引无数的游客来欣赏美丽的风景。此处用不定式作宾语补足语。attract sb t d sth为固定搭配，意为“吸引某人做某事”。故填t appreciate。
33. interactin 考查名词。句意：与自然和谐相处的中国古代哲学在这里开花结果。空前有形容词修饰，所以此处用名词，表抽象意义。the harmnius interactin with意为“与……和谐互动”。故填interactin。
34. and 考查并列连词。句意：1 000年前，为了防止洪水泛滥，兴化市勤劳聪明的人们在沼泽地里挖了一排深沟或溪流，并且在一边堆起土壤，形成了适合耕种的田地。动词dug和“piled up”是表示并列关系的两个谓语动词。故填and。
35. are discnnected 考查谓语。句意：这些领域彼此是不相连的，看起来像海上的小岛。此处描述客观事实，所以用一般现在时。动词discnnect和主语“The fields”是被动关系，所以要用被动语态；主语是“The fields”，表示复数的意义，所以be动词用are。be discnnected t each ther意为“彼此是断开的/不连通的”。故填are discnnected。
36. transfrmed 考查谓语。句意：由于当地的自然条件，勤劳聪明的当地祖先将不适合农业生产的低洼湿地改造成农田，为当地人提供谷物和蔬菜。根据“lcal ancestrs”可知，用一般过去时，表示过去发生的事情。故填transfrmed。
37. the 考查冠词。句意见上题解析。the lcals意为“当地人”。故填the。
38. eclgical 考查形容词。句意：同时，这些土地保持了原始的水流、河流和运河，以及周边自然的生态环境。此处用形容词修饰后面的名词envirnment。故填eclgical。
39. representing 考查非谓语动词。句意：它已经形成了一个代表人与自然的统一的新景观。此处用现在分词作后置定语。“a new landscape”和represent表示主动的关系。故填representing。
40. glbally 考查副词。句意：今天，兴化垛田独特的地貌已经成为全球重要的农业遗产。此处用副词glbally修饰形容词imprtant。故填glbally。
Passage 4
41. varius 42. as 43. meaning 44. visited 45. wh
46. an 47. freely 48. rganizatin 49. fund 50. difficulties

41. varius 考查形容词。句意：百科全书是关于各种事物的信息性文章的集合。空处修饰名词things，应用形容词作定语。varius意为“各种各样的”。故填varius。
42. as 考查介词。句意：百科全书过去是以书籍的形式印刷的。根据语境可知，此处指“作为”，应用介词as。故填as。
43. meaning 考查现在分词。句意：Wiki是一个网络术语，意思是“公众可以编辑的网站”。动词mean和逻辑主语term之间是主动关系，所以用现在分词。故填meaning。
44. visited 考查过去分词。句意：它现在是互联网上访问量第五大的网站。visit和名词website之间是动宾关系，所以用过去分词作定语。故填visited。
45. wh 考查定语从句。句意：它有300种语言的600万篇文章，每天有数十亿人访问它，他们想要找到关于任何有关科学、数学、语言、艺术、文化和公司历史的信息。分析句子结构可知，空处引导一个非限制性定语从句，先行词是peple，指人，关系词在从句中作主语，应用wh引导。故填wh。
46. an 考查不定冠词。句意：维基百科采用开放编辑模式。mdel是可数名词，此处泛指“一个开放的编辑模式”，应用不定冠词，且pen以元音音素开头。故填an。
47. freely 考查副词。句意：只要能上网，任何人都可以免费使用维基百科。修饰形容词available应用副词。故填freely。
48. rganizatin 考查名词。句意：毫无疑问，许多维基百科页面包含错误，尽管该组织试图用审查系统来解决问题。分析句子结构及空前的the可知，空处应填名词作从句的主语。根据助动词des可知，应用名词单数。故填rganizatin。
49. fund 考查时态。句意：事实上，《自然》杂志2005年的一份报告发现，它的可靠性仅略低于大英百科全书。根据“a 2005 reprt”可知，此处讲述过去发生的事情，应用一般过去时。故填fund。
50. difficulties 考查名词复数。句意：尽管困难重重，Jimmy Wales说他仍将坚持自己的愿望——“为世界做一些有用的事情。”此处应填名词作介词Despite的宾语；根据these可知，应用复数形式。故填difficulties。