Unit 3 Diverse Cultures Grammar语法省略练习-2025-2026学年高一英语人教版必修第三册

Unit 3 Diverse Cultures 重点语法 省略 一、单句语法填空 1．This cultural treasure has evolved over generations, maintaining its essential character while (adapt) to contemporary contexts. 2．Today, though (face) modern challenges, dough figurine art is recognized as an intangible cultural heritage. 3．Once (use) for books and tea packs, mulberry paper has a smooth touch and a long life, which keeps words safe across time. 4．Back then, while (walk) in the park, park worker Rong Canzhong noticed a smart great tit carrying dry grass into a lamppost. 5．With the support of multimedia technology, Li brings this historical figure to life, creating a visual feast that enhances the drama while (honor) the core traditions of Peking Opera. 6．Unless (repair) properly, the machine may break down again. 7．Unless (invite), you shouldn't go to the private party. 8．Video games can be a poor influence if (leave) in the wrong hands. 9．When (refer) to that incident of last year, he still felt very frightened. 10．Though (lack) experience, Mike was convinced that he would get a higher pay by working hard. 11．He said the plan announced on Sunday, if (approve), would avoid such a problem. 12．When (combine) with water, the white powder became light green at once. 13．When (approach) the finish line, I found that one of my competitors fell down and got injured. 14．Experts warn that medical waste from hospitals, if not (handle) properly, may lead to spreading diseases. 15．Once (show), the TV play will be very popular with young people. 16．The workers should not be blamed because they just carried out the order as (tell). 17．Many adventure activities should be strictly regulated if not (ban). 18．While (drive) to a nearby town one day, I saw an elderly man standing in the burning sun. 19．If (consume) mistakenly, some poisonous mushrooms can be deadly. 20．Anyone, once (test) positive for Ebola, the deadly disease, will receive free medical treatment from the government. 21．This indicates that Goffin’s cockatoos do indeed possess an allocentric frame of reference when (move) objects in space, similar to two-year-old babies. 22．Do not leave the building until (instruct) to do so. 23．Once (print), this dictionary will be very popular. 24．To my relief，the new medicine bought from Japan helped (relief) the pain of my brother’s injured leg. 25．In a word, when (travel) abroad, we should follow local habits. 26．Some diseases are not at all dangerous if (treat) in time. 27．That is why the Japanese government is reportedly going to approve a strategy of discharging the water to the ocean, as (recommend) by scientific advisers. 28．In an afternoon of 1929, a farmer and his son in a village of China’s Sichuan Province accidentally discovered a true wonder of civilization when (dig) a well. 29．A pitcher needs to throw the ball with one hand and (wear) a baseball glove on the other—something that Jim couldn’t do. 30．The director was fully convinced that this moving story, if （adapt）for film, would be a hit. 31．When (ask) for his view about the teaching work, Philip said he found it very interesting and rewarding. 32．If (dress) in a white uniform, he looks more like a cook than a doctor. 33．There is no other chance like a GDA programme. Join us as a volunteer manager to develop your own skills while (bring)benefits to the communities. 34．The pleasant and charming environment of the city makes many tourists (burst) into it. 35．Water can be changed into vapor when (heat). 36．Though (tire), they went on working. 37．It’s too noisy to read in the railway station. I would usually look around the shops while (wait) for the train. 38．They knew her very well. They had seen her (grow) up from childhood. 39．The plant will choke ponds and waterways if (leave) uncontrolled. 40．It shames me to say it, but I told a lie when (question) at the meeting by my boss. 二、完成句子 41． , I would like to do voluntary work for my community. 如果可能的话，我想为我的社区做一些志愿工作。(条件状语从句的省略) 42． , I realised how hard it was to work in the field under the hot sun. 劳动的时候，我意识到炎炎烈日下在农田中劳作是多么艰难。 43． , the incident attracted many people’s attention immediately. 一旦公布于众，这个事件会立刻引起人们的注意。 44．For another, , they may be interrupted from time to time by their children or family. 另一方面，在家工作时，他们可能会不时地被子女或家人打扰。 45．Her family, , was richer than mine. 要说有什么区别的话，她家比我家有钱。 46． , he made a lot of friends. 在美国学习时，他结交了很多朋友。 47．When I study English, I like to put my dictionary within my reach . 当我学习英语的时候，我喜欢把词典放在我能拿得到的地方，这样我就可以在需要的时候查阅它。 48．You can’t be too careful . 开车时越小心越好。 49． , Li Shizhen suffered a lot from tasting some unknown plants on his own. 当李时珍写这本书时，他遭受了许多痛苦亲自尝一些不知名的植物。 50． , we will hold video conferences with our partners around the world. 如有必要，我们将与世界各地的合作伙伴举行视频会议。（条件状语从句的省略形式） 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $ Unit 3 Diverse Cultures 重点语法 省略 一、单句语法填空 1．This cultural treasure has evolved over generations, maintaining its essential character while (adapt) to contemporary contexts. 【答案】adapting 【详解】考查状语从句的省略。句意：这一文化瑰宝历经数代演变，它在适应当代环境的同时保持着其本质特征。在when, while, if, as if, though (或although), as, until, once, whether, unless, where等连词连接的状语从句中，常省略跟主句相同的主语和be动词；“while (adapt) to contemporary contexts”是时间状语从句，原句为“while this cultural treasure is adapting to contemporary contexts”，符合状语从句省略条件，省略this cultural treasure is后，应保留现在分词adapting。故填adapting。 2．Today, though (face) modern challenges, dough figurine art is recognized as an intangible cultural heritage. 【答案】facing 【详解】考查状语从句中的省略。句意：如今，尽管面临现代社会的诸多挑战，面塑艺术仍被认定为一项非物质文化遗产。该句为让步状语从句中的省略结构，主语dough figurine art与face为主动关系，用现在分词facing，其完整结构为“though it is facing”。故填facing。 3．Once (use) for books and tea packs, mulberry paper has a smooth touch and a long life, which keeps words safe across time. 【答案】used 【详解】考查非谓语动词中的过去分词作状语。句意：桑皮纸曾用于书籍和茶包，触感光滑，寿命长，能让文字在时间长河中保存完好。use“使用”。当once引导的时间状语从句的主语与主句的主语一致时，且从句含有be动词时，可以省略从句的主语和be动词。本句中的时间状语从句完整句子为Once it was used for books and tea packs，省略it was，保留过去分词。故填used。 4．Back then, while (walk) in the park, park worker Rong Canzhong noticed a smart great tit carrying dry grass into a lamppost. 【答案】walking 【详解】考查状语从句的省略。句意：当时，公园工作人员荣灿忠在公园散步时，注意到一只聪明的大山雀叼着干草飞进了一根路灯柱。while 引导的时间状语从句中，当从句主语和主句主语一致且从句含有be 动词时，可将从句主语和be 动词省略，此处从句主语是park worker Rong Canzhong，表示“当他在散步时”，完整形式为while he was walking in the park，省略后为while walking in the park。故填walking。 5．With the support of multimedia technology, Li brings this historical figure to life, creating a visual feast that enhances the drama while (honor) the core traditions of Peking Opera. 【答案】honoring 【详解】考查状语从句中的省略。句意：在多媒体技术的支持下，李让这位历史人物活了起来，打造出一场视觉盛宴，既丰富了戏剧效果，又彰显了京剧的核心传统。honor“尊敬，尊重，给与……的光荣”。当状语从句的主语与主句的主语一致时或从句主语为it，且从句含有be动词时，可以省略状语从句的主语和be动词。本句中从句完整形式为while he is honoring the core traditions of Peking Opera，省略he is后，保留现在分词honoring。故填 honoring。 6．Unless (repair) properly, the machine may break down again. 【答案】repaired 【详解】考查状语从句的省略用法。句意：除非被正确修理，否则这台机器可能会再次出故障。分析句子可知，此处为Unless引导状语从句的省略用法，当状语从句的主语和主句的主语一致，且从句谓语含有 be 动词时，可以省略从句的主语和 be 动词。还原句子：原句可以还原为“Unless (it is) repaired properly...”。主语 the machine（机器）和动词 repair（修理）之间是被动关系（机器是被修理的），所以要用过去分词 repaired。故填repaired。 7．Unless (invite), you shouldn't go to the private party. 【答案】invited 【详解】考查状语从句的省略。句意：除非得到邀请，否则你不要去参加这个私人聚会。从句主语与主句主语you一致，从句原句为“Unless you are invited”，符合“主语一致+有be”的省略条件，省略“you are”，填invite的过去分词invited。故填invite。 8．Video games can be a poor influence if (leave) in the wrong hands. 【答案】left 【详解】考查状语从句的省略。句意：电子游戏如果落入不妥人之手，就可能产生不良影响。这里考查了 leave 作及物动词的用法，可以理解为 if (the video games are) left in the wrong hands，主从句的主语相同，且从句中含有 be 动词，省略从句中的主语和be动词。故填left。 9．When (refer) to that incident of last year, he still felt very frightened. 【答案】referring 【详解】考查状语从句的省略用法。句意：提到去年的那件事，他仍然感到很害怕。分析句子可知，此处为when引导时间状语从句的省略用法，从句主语he和从句谓语动词短语refer to是主动关系，正在进行的动作，用be doing形式，当主从句主语一致时，可省略从句的主语和be动词，用现在分词referring。故填referring。 10．Though (lack) experience, Mike was convinced that he would get a higher pay by working hard. 【答案】lacking 【详解】考查状语从句的省略用法。句意：迈克虽然缺乏经验，但他坚信通过努力工作，他会得到更高的薪水。分析句子可知，此处为Though引导的让步状语从句中省略用法，当主从句主语保持一致时，可省略从句主语和be动词，该从句省略了主语Mike和be动词was。动词lack和Mike为主动关系，所以为现在分词形式。故填lacking。 11．He said the plan announced on Sunday, if (approve), would avoid such a problem. 【答案】approved 【详解】考查时态，语态，主谓一致和省略。句意：他说，周日宣布的计划如果获得批准，将避免这样的问题。if引导的从句意为“如果它被批准”，由said可知，用一般过去时，且是被批准，因此用一般过去时的被动语态，也就是说if引导的从句是“if it was approved”，状语从句中主语是it，且有be动词时，可省略从句中的主语和be动词，因此空格处是approved。故填approved。 12．When (combine) with water, the white powder became light green at once. 【答案】combined 【详解】考查省略句。句意：当与水混合时，白色粉末立即变成浅绿色。分析句子可知，连词“When”引导了时间状语从句的省略句，省略了主要和be动词，故空处应为非谓语动词，与主语“the white powder”之间为被动关系，表示“白色粉末被与水混合”，故应用过去分词形式。故填combined。 13．When (approach) the finish line, I found that one of my competitors fell down and got injured. 【答案】approaching 【详解】考查省略句。句意：当接近终点线时，我发现我的一个竞争对手摔倒了，受伤了。在when引导的状语从句中，当从句主语和主句主语一致且从句含有be的某种形式时，可省略从句的主语和be，相当于省略了I was。故填approaching。 14．Experts warn that medical waste from hospitals, if not (handle) properly, may lead to spreading diseases. 【答案】handled 【详解】考查状语从句的省略。句意：专家警告说，医院的医疗废物如果处理不当，可能会导致疾病传播。此处是if引导的条件状语从句的省略，从句的主语是medical waste，和动词handle之间是被动关系，故此处使用一般现在时的被动语态，完整形式为if it (medical waste) is not handled properly，当状语从句主语和主句主语一致，且从句含有be的某种形式时，可省略从句的主语和be，故填handled。 15．Once (show), the TV play will be very popular with young people. 【答案】shown 【详解】考查非谓语动词。句意：一旦播出，这部电视剧就会受到年轻人的欢迎。分析句子结构和意思可知，动词show和句子主语the TV play是逻辑上的动宾关系，所以用过去分词，表示被动，作状语，此处是状语从句的省略，once引导条件状语从句，与主句主语一致，once shown=once it is shown，省略主语和be动词形式。故填shown。 16．The workers should not be blamed because they just carried out the order as (tell). 【答案】told 【详解】考查非谓语动词。句意：工人们不应该受到指责，因为他们只是按照被告知的命令执行的。tell与逻辑主语they之间是被动关系，所以空处应用过去分词形式told构成as引导的状语从句的省略，即当主句和从句为同一主语时，且从句含有be动词，从句可以省略主语和be动词，此处as引导方式状语从句，省略了they are，as told作方式状语，符合题意。故填told。 17．Many adventure activities should be strictly regulated if not (ban). 【答案】banned 【详解】考查状语从句中的省略。句意：许多冒险活动即使没有被禁止，也应该受到严格监管。分析句子结构可知，条件状语从句中，主语与主句主语一致时，从句中的主语和be动词可以省略，ban与句子主语Many adventure activities之间为被动关系，故使用过去分词形式，其完整的表达应为“they are not banned”。故填banned。 18．While (drive) to a nearby town one day, I saw an elderly man standing in the burning sun. 【答案】driving 【详解】考查状语从句的省略。句意：有一天，我开车去附近的一个小镇时，看到一位老人站在烈日下。“当某人正在做某事时”用While引导时间状语从句，主动语态，从句中用进行时，结合saw可知，事情发生在过去，因此空格处是过去进行时，原句为：While I was driving to a nearby town one day，又因时间状语从句的主语和主句主语一致，且从句中有be动词时，可省略从句中的主语和be动词，因此空格处是driving。故填driving。 19．If (consume) mistakenly, some poisonous mushrooms can be deadly. 【答案】consumed 【详解】考查状语从句的省略。句意：误食了一些有毒的蘑菇可能会是致命的。分析句子结构可知，该句为if引导的条件状语从句，从句与主句的主语一致，为some poisonous mushrooms；从句主语与谓语consume之间为逻辑上的被动关系，表示“被误食”，可省略从句主语和be，只保留动词的过去分词形式，此处相当于过去分词短语作状语，故填consumed。 20．Anyone, once (test) positive for Ebola, the deadly disease, will receive free medical treatment from the government. 【答案】tested 【详解】考查状语从句省略。句意：任何人一旦对埃博拉这种致命疾病检测呈阳性，都将接受政府的免费医疗。分析句子可知，这里考查状语从句省略，补充完整从句为once he is tested positive for Ebola，当状语从句的主语与主句主语一致，且有be动词时，可以省略从句主语和be动词。故填tested。 21．This indicates that Goffin’s cockatoos do indeed possess an allocentric frame of reference when (move) objects in space, similar to two-year-old babies. 【答案】moving 【详解】考查状语从句的省略用法。句意：这表明，当高芬凤头鹦鹉在空间中移动物体时，确实拥有一种异心参照系，类似于两岁的婴儿。分析句子可知，此处为when引导的时间状语从句，当从句主语和主句主语一致时，可省略从句中主语和Be动词，该句为省略从句主语Goffin’s cockatoos和be动词are。故填moving。 22．Do not leave the building until (instruct) to do so. 【答案】instructed 【详解】考查状语从句的省略。句意：除非接到指示，否则不要离开大楼。根据句意可知，连词until引导的是一个时间状语从句，其完整的句子应该是until you are instructed to do so.该状语从句符合省略的条件（主句和从句的主语一致；从句主要动词是be的某种形式），这时可以把从句的主语和be动词省略，该句中省略掉you are。故填instructed。 23．Once (print), this dictionary will be very popular. 【答案】printed 【详解】考查状语从句的省略。句意：这本词典一旦印刷，就会很受欢迎。分析句子可知，本句为状语从句的省略，还原为：Once this dictionary is printed，省略了this dictionary is 。故填printed。 24．To my relief，the new medicine bought from Japan helped (relief) the pain of my brother’s injured leg. 【答案】relieve 【详解】考查动词。句意：令我欣慰的是，从日本买的新药缓解了我弟弟受伤的腿的疼痛。此处表示“缓解”应用动词relieve，且上文为短语help do sth.。故填relieve。 25．In a word, when (travel) abroad, we should follow local habits. 【答案】travelling 【详解】考查时间状语从句省略。句意：总之，出国旅游时，我们应该遵循当地的习惯。当when 引导时间状语时，若主从句主语一致且从句谓语动词含be的形式时，可省略从句的主语及be ，完整的从句部分为：when we are travelling abroad，省略we和are。故填travelling。 26．Some diseases are not at all dangerous if (treat) in time. 【答案】treated 【详解】考查状语从句的省略。句意：有些疾病如果能及时治疗就根本不危险。分析可知，此处为状语从句的省略，当从句的主语和主句的主语一致，且从句谓语中有be时，可省略从句主语和be。Some diseases和动词treat之间是被动关系，完整的句子为if they are treated in time，省略了they和are。故填treated。 27．That is why the Japanese government is reportedly going to approve a strategy of discharging the water to the ocean, as (recommend) by scientific advisers. 【答案】recommended 【详解】考查省略句。句意：这就是为什么据报道，日本政府将按照科学顾问的建议，批准一项将水排入海洋的战略。在as引导的方式状语从句中，当从句主语和主句主语一致或从句主语是it且从句谓语含有be时，可省略从句的主语和be，从句完整形式为as it was recommended by scientific advisers，这里省略了it was。故填recommended。 28．In an afternoon of 1929, a farmer and his son in a village of China’s Sichuan Province accidentally discovered a true wonder of civilization when (dig) a well. 【答案】digging 【详解】考查状语从句的省略。句意：1929年的一个下午，在中国四川省的一个村庄，一个农民和他的儿子在挖井时意外地发现了一个真正的文明奇迹。当时间状语从句的主语与主句主语一致，且有be动词时，可以省略从句的主语及be动词；此处表示过去正在发生的动作，要用过去进行时，还原之后即when (the farmer and his son were) digging a well；故填digging。 29．A pitcher needs to throw the ball with one hand and (wear) a baseball glove on the other—something that Jim couldn’t do. 【答案】wear 【详解】考查动词不定式省略。句意：投手需要一只手投球，另一只手戴棒球手套，这是吉姆做不到的。此空和and前动词不定式to throw并列，应该用动词不定式，且并列的两个动词不定式，第二个动词不定式中的to可省略。故填wear。 30．The director was fully convinced that this moving story, if （adapt）for film, would be a hit. 【答案】adapted 【详解】考查状语从句的省略。句意：导演深信这个感人的故事如果改编成电影，一定会大卖。本句是if引导的条件状语从句的省略，还原为：if this moving story was adaped for film，省略的是the director was。故填adapted。 31．When (ask) for his view about the teaching work, Philip said he found it very interesting and rewarding. 【答案】asked 【详解】考查状语从句的省略。句意：当被问及他对教学工作的看法时，Philip说他发现教学工作非常有趣和有益。根据句意及句子结构可知，主从句的主语都是Philip，Philip与ask是动宾关系，故用被动语态(be done)。当主从句主语一致，且从句中含有be动词，故将主语和be省略，故填asked。 32．If (dress) in a white uniform, he looks more like a cook than a doctor. 【答案】dressed 【详解】考查状语从句省略句和过去分词。句意：如果穿着白色制服，他看起来更像一个厨师而不是医生。此处是If引导的条件状语从句省略句，从句主语是he与从句谓语动词dress是被动关系，从句谓语用be done形式，从句主语与主句主语一致且从句含有be动词，常省略从句的主语和be动词，表被动，dress用过去分词形式，故填dressed。 33．There is no other chance like a GDA programme. Join us as a volunteer manager to develop your own skills while (bring)benefits to the communities. 【答案】bringing 【详解】考查时间状语从句的省略。句意：没有比GDA课程更好的机会了。加入我们，成为一名志愿者经理，发展你自己的技能，同时为社区带来好处。分析句子结构及句意可知此处为时间状语从句的省略，将句子还原后为Join us as a volunteer manager to develop your own skills while you are bringing benefits to the communities，主句部分为省略主语you的祈使句，在when/while引导的时间状语从句中，如果从句主语和主句主语一致，而从句的谓语动词中又含有be动词的形式，则可以省略从句主语和be动词。故填bringing。 34．The pleasant and charming environment of the city makes many tourists (burst) into it. 【答案】burst 【详解】考查短语结构。句意：这座城市令人愉悦的迷人的环境让很多游客蜂拥而入。短语make sb do sth让某人做某事；其中省略to的不定式在句中做宾语补足语。故填burst。 35．Water can be changed into vapor when (heat). 【答案】heated 【详解】考查状语从句的省略。句意：水加热后可以变成蒸汽。分析句子结构可知，when引导了状语从句，完整从句为when water is heated，当状语从句的主语与主句主语一致,且含有be动词时，可以将从句中的主语和be动词省略。故填heated。 36．Though (tire), they went on working. 【答案】tired 【详解】考查形容词和省略。句意：尽管很累，他们还是继续工作。根据句意可知，空格处意为“他们很累”，由went可知，句子时态用一般过去时，用ed结尾的形容词修饰they，因此“他们很累”是they were tired，状语从句中主语和主句的主语一致，且从句中有be动词时，可省略从句中的主语和be动词，因此空格处是tired。故填tired。 37．It’s too noisy to read in the railway station. I would usually look around the shops while (wait) for the train. 【答案】waiting 【详解】考查状语从句省略句。句意：句意：在火车站里看书太吵了。等火车时，我通常会逛逛商店。此处是时间状语从句的省略，从句主语是I与从句谓语wait for是主动关系，正在进行，从句谓语用be doing形式，从句主语与主句主语一致且从句含有be动词，常省略从句的主语和be动词，wait用现在分词形式。故填waiting。 38．They knew her very well. They had seen her (grow) up from childhood. 【答案】grow 【详解】考查省略。句意：他们非常了解她。他们是看着她从小长大的。see sb. do sth.“看见某人做了某事（侧重全过程）”，see后接省去to的不定式作宾语补足语，结合句意，故填grow。 39．The plant will choke ponds and waterways if (leave) uncontrolled. 【答案】left 【详解】考查状语从句中的省略。句意：如果不加以控制，该工厂将堵塞池塘和水道。根据句子结构分析可知，此处为状语从句的省略，从句省略了主语the plant，从句谓语变成了非谓语，因主语the plant与动词leave是被动关系，因此需使用过去分词，故填left。 40．It shames me to say it, but I told a lie when (question) at the meeting by my boss. 【答案】questioned 【详解】考查省略句。句意：说出来让我感到羞愧，我在会议上被老板盘问质疑的时候说了谎。分析句子结构可知，but前后连接两个句子，but后面的为复合句，其中“I told a lie”是主句，“when_____(question) at the meeting by my boss.”是when引导的时间状语从句，且主句和从句为同一主语I，所以从句可以省略主语和系动词，即从句中省略了主语I和系动词was，此处question为动词，表示“质疑”，和主语I是被动关系，应用过去分词形式questioned，故填questioned。 二、完成句子 41． , I would like to do voluntary work for my community. 如果可能的话，我想为我的社区做一些志愿工作。(条件状语从句的省略) 【答案】If possible 【详解】考查状语从句的省略。“如果可能的话”应用if possible，是if引导的条件状语从句if it is possible的省略形式，if置于句首，首字母大写。故填If possible。 42． , I realised how hard it was to work in the field under the hot sun. 劳动的时候，我意识到炎炎烈日下在农田中劳作是多么艰难。 【答案】While working 【详解】考查状语从句的省略。“劳动的时候”为“While working”，原句为While I was working，当主从句主语一致且从句谓语含有be动词时，可省略从句的主语和be动词，这里主从句主语都是I，所以省略I was，变为while working，位于句首单词首字母大写。故填While working。 43． , the incident attracted many people’s attention immediately. 一旦公布于众，这个事件会立刻引起人们的注意。 【答案】Once exposed to the public 【详解】考查状语从句的省略。表示“一旦”用once，引导时间状语从句，位于句首，首字母大写。从句中：用it作主语，代替the incident；表示“公布于众”expose...to the public，与it为被动关系，谓语用was exposed；当状语从句的主语与主句的主语一致时或从句主语为it时，可以省略状语从句的主语和be动词。故Once引导的从句省略了主语it和be动词was，保留过去分词exposed。故填Once exposed to the public。 44．For another, , they may be interrupted from time to time by their children or family. 另一方面，在家工作时，他们可能会不时地被子女或家人打扰。 【答案】while working at home 【详解】考查状语从句的省略。表示“在家工作时”用while引导时间状语从句，表示“工作”用现在进行时，主语为they，be动词用are，从句主语与主句一致，可以省略从句的主语和be动词，表示“在家工作”用work at home。故填while working at home。 45．Her family, , was richer than mine. 要说有什么区别的话，她家比我家有钱。 【答案】if anything 【详解】考查固定搭配。根据句意，if anything作插入语，意为“如果有什么不同的话”，用于补充说明前后内容的比较关系。故填if anything。 46． , he made a lot of friends. 在美国学习时，他结交了很多朋友。 【答案】When studying in America 【详解】考查状语从句的省略。“在……时”使用when引导时间状语从句，从句主语“他”he，“学习”study，从句描述在过去某段时间正在发生的动作，使用过去进行时，即was studying，“在美国”in America，状语从句中，从句主语与主句主语he一致，且从句中含有be动词形式，可省略主语he和be动词，且句首单词首字母大写。故填When studying in America。 47．When I study English, I like to put my dictionary within my reach . 当我学习英语的时候，我喜欢把词典放在我能拿得到的地方，这样我就可以在需要的时候查阅它。 【答案】so that I can refer to it when necessary 【详解】考查目的状语从句和状语从句的省略。根据英汉意思对比可知，空处应填“这样我就可以在需要的时候查阅它”，“这样”可翻译为so that，引导目的状语从句；“我”翻译为I；“可以”翻译为can；“查阅”翻译为refer to，放在情态动词can后用动词原形；“它”指代前面的dictionary，翻译为it；“在需要的时候”翻译为when necessary，为状语从句的省略。故填so that I can refer to it when necessary。 48．You can’t be too careful . 开车时越小心越好。 【答案】when driving 【详解】考查状语从句中的省略。表示“当……时候”用when，引导时间状语从句；时间状语从句表示“当你开车时”，从句中：表示“你”用you；表示“开车”用drive，从句描述现在正在发生的事情，时态用现在进行时，谓语用are driving，当时间状语从句的主语和主句主语一致，且从句中有be动词时，可将从句主语和be动词省略，所以此处省略了you are。故填when driving。 49． , Li Shizhen suffered a lot from tasting some unknown plants on his own. 当李时珍写这本书时，他遭受了许多痛苦亲自尝一些不知名的植物。 【答案】While writing the book 【详解】考查时间状语从句的省略。根据句意，“当李时珍写这本书时”中，“当……时”用“while”引导时间状语从句，表示“写这本书”为write the book，结合句意以及下文的谓语动词suffered可知，此处使用过去进行时，描述过去某段时间动作正在进行，从句完整形式为“while Li Shizhen was writing the book”，由于从句主语与主句主语“Li Shizhen”一致，且从句含有be动词“was”，可省略从句的主语和be动词，简化为“while writing the book”，位于句首单词首字母需大写。故填While writing the book。 50． , we will hold video conferences with our partners around the world. 如有必要，我们将与世界各地的合作伙伴举行视频会议。（条件状语从句的省略形式） 【答案】If necessary 【详解】考查条件状语从句的省略形式。“如有必要”为“If necessary”这里完整形式为If it is necessary，当主从句主语一致且从句谓语含be动词时，可省略从句的主语和be动词。故填 If necessary。 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $