Unit 5 Working the land（教材考点精练）英语人教版2019选择性必修第一册

Unit 5 Working the land (教材考点精练) (时间：60分钟，满分：100分) 1、 用括号内所给单词的适当形式填空(本大题共20小题，每小题2分，共40分) 1．The company’s success was built on the (assume) that demand would continue to grow. 2． (devote) all his energy to the subject, he finally overcame the difficulties and achieved his target. 3．Over time, it (expand) to include multiple options of soups, vegetables, meats and sauces. 4． impressed me most is that he always has access to various new technologies. 5．It’s an approach (root) in his belief about music’s transcendent power to emotionally uplift audiences. 6．They were reduced to extreme (poor) because of laziness. 7．I like a car with low fuel (consume). 8．The company’s (expand) into overseas markets requires a deep understanding of different cultures. 9． (convince) that he himself had done nothing wrong, he refused to apologize. 10．One of the most striking (characteristic) of Morris’s designs is a sensuous vitality derived from his deep love of nature. 11．In other words, ideal life doesn’t always consist with the (real). 12．In order to make more progress, we have no alternative but (make) full use of spare time. 13．He has a delicate (digest) and cannot eat oily food. 14． (provide) that you finish your work, you may go. 15．What he needs most (be) money. 16．It is the first time that China and Brazil (tackle) the climate crisis together. 17．Communication between employees in this cafe is done (entire)through sign language, creating a quiet atmosphere that customers appreciate. 18．A microwave cooks food much faster than a (convention) oven. 19．He quickly assessed what (alternative) were open to him. 20．Tourism is double-edged, (boost) the economy but damaging the environment. 2、 根据句意及首字母或汉语提示完成单词(本大题共20小题，每小题1.5分，共30分) 1．My friend recommend me a good Italian restaurant in the (市区的) area. 2．By 2028, two-thirds of the world’s population may face water s (短缺). 3．The community garden focuses on growing o (有机的，绿色的) vegetables for local families. 4．In the speech, he explained some of the positive (方面) of technological development. 5．Speed is the e (必不可少的、基本的) ingredient of all athletics. 6．The failure of the peace talks set off a chain of (危机). 7．As is known, heating a copper bar will cause it to (使扩大). 8．His explanation was e (完全地；彻底地) different from what I had expected. 9．It is reported that the plan had received (广泛的) support throughout the country. 10．Despite her family’s (贫穷), she managed to excel in school and earn a scholarship to university. 11．If the restaurant is full, we can consider the Italian place as an (可供选择的事物). 12．The whole argument rests on a false (假设). 13．I am fully convinced that the l (闲暇) lifestyle is undergoing a decline with the progress of modern society. 14．Hot days are (典型的，特有的) weather of the summer months. 15．It took many hours to (使信服) the court of his guilt. 16．An important (特征) of Van Gogh’s paintings is their bright colors 17．D (致力于) himself to bringing up the secret of nature, the young scientist has little time for entertainment. 18．Considerable efforts (奉献，投入) to providing tourists with a better travel experience, Harbin has become an attractive tourism destination. 19．The new manager was hired to t (处理；解决) the company’s financial crisis. 20．Today, it is estimated that about 60 percent of domestic rice (消费) in China is comprised of hybrid rice. 3、 完成句子(本大题共15小题，每小题2分，共30分) 1．The injured bird managed to fly again after treatment, and this is amazing. (用“名词性从句”句式改写句子) 2．不管他来还是不来，都没有关系。（whether） makes no difference. 3．He (战胜了疾病) with the help of his family. (根据汉语提示完成句子) 4．Andy was appointed to head the research team that (由……组成) dozens of experts from Cambridge. (根据汉语提示完成句子) 5．After hundreds of failed experiments, they (偶遇一种有希望的化学品). (根据汉语提示完成句子) 6．Increased investment in new technologies will, (相应地), lead to increased profits. （根据汉语提示完成句子） 7．他别无选择，只能让自己对袁的耕作方法有更多的了解。（have no alternative but to do） He Yuan’s farming methods. 8．It doesn’t matter . 在这家商店中用现金或信用卡支付都可以。 9．We should keep the Earth healthy its natural resources. 当我们利用自然资源的时候, 我们应该保持地球的健康。 10．What I can do now is give you . 我现在能做的是给你一个大致相近的估计。 11． (让他感到满意的) was that his students were able to read, speak and write in English. (根据汉语提示完成句子) 12．I to see a doctor. 我试图说服他去看病。 13．据估计，可能有十分之一的心脏病由缺乏锻炼引起，并且缺乏锻炼会导致大多数健康问题。 lack of exercise could be responsible for one in ten cases of heart disease and cause most of the health problems. 14．To get this job, you must (使我相信你的能力) before you are employed. (根据汉语提示完成句子) 15．Mr Bacon has been working in the school for about 20 years, （把他所有的精力都投入到教学和研究中）. (根据汉语提示完成句子) ( 3 / 3 学科网（北京）股份有限公司 ) 学科网（北京）股份有限公司 $$ Unit 5 Working the land (教材考点精练) (时间：60分钟，满分：100分) 1、 用括号内所给单词的适当形式填空(本大题共20小题，每小题2分，共40分) 1．The company’s success was built on the (assume) that demand would continue to grow. 【答案】assumption 【详解】考查名词。句意：该公司的成功建立在需求将持续增长的假设之上。根据空前定冠词the及空后“that demand would continue to grow”可知，空处应用名词assumption，表示“假设”，作介词on的宾语，on the assumption that是固定短语，意为“假定……；在……的假设之下”。故填assumption。 2． (devote) all his energy to the subject, he finally overcame the difficulties and achieved his target. 【答案】Devoting 【详解】考查非谓语动词。句意：他把全部精力都投入到这个课题上，最终克服了困难，达到了目标。分析句子可知，此处为非谓语动词作状语，devote和逻辑主语he为主动关系，所以为现在分词形式。故填Devoting。 3．Over time, it (expand) to include multiple options of soups, vegetables, meats and sauces. 【答案】has expanded 【详解】考查时态。句意：随着时间的推移，它已经扩展到包括汤、蔬菜、肉类和酱汁的多种选择。根据句意和句中“Over time”可知，句子应用现在完成时，“it”和“has”连用，“expand”的过去分词为“expanded”。故填has expanded。 4． impressed me most is that he always has access to various new technologies. 【答案】What 【详解】考查主语从句。句意：最让我印象深刻的是他总是能接触到各种新技术。这里考查主语从句，从句中缺主语，表示“……的事情”，应用连接代词what，且句首时首字母应大写。故填What。 5．It’s an approach (root) in his belief about music’s transcendent power to emotionally uplift audiences. 【答案】rooted 【详解】考查非谓语动词。句意：这是一种植根于他对音乐具有在情感上鼓舞听众的超凡力量的信念的方法。此处需用非谓语动词作后置定语，修饰名词approach，root为动词，意为“扎根；使基于”，根据be rooted in，意为“植根于；基于”可知，root与逻辑主语approach之间为被动关系，所以此处应用过去分词rooted。故填rooted。 6．They were reduced to extreme (poor) because of laziness. 【答案】poverty 【详解】考查名词。句意：由于懒惰，他们陷入了极度的贫困。根据句子分析可知，此处需要填入一个名词形式，与前面的形容词extreme构成名词短语，作介词的宾语，表示“极度的贫困”。所给词poor的名词形式为poverty，故填poverty。 7．I like a car with low fuel (consume). 【答案】consumption 【详解】考查名词。句意：我喜欢低油耗的汽车。空处应用名词作介词with的宾语，动词consume的名词形式是consumption“消耗”，为不可数名词。故填consumption。 8．The company’s (expand) into overseas markets requires a deep understanding of different cultures. 【答案】expansion 【详解】考查名词。句意：公司向海外市场的扩张需要对不同的文化有深刻的了解。空处应用名词，作主语，expansion表示“扩张”，为不可数名词。故填expansion。 9． (convince) that he himself had done nothing wrong, he refused to apologize. 【答案】Convinced 【详解】考查非谓语动词。句意：他确信自己没有做错任何事，因此拒绝道歉。句子主干成分完整，空处是非谓语，convince“使确信，使信服”和he逻辑上是被动关系，因此用convince的过去分词形式，作原因状语，且句首单词的首字母需大写。故填Convinced。 10．One of the most striking (characteristic) of Morris’s designs is a sensuous vitality derived from his deep love of nature. 【答案】characteristics 【详解】考查名词复数。句意：莫里斯设计最显著的特点之一是他对自然的热爱所带来的感官活力。one of后应用名词复数形式，characteristic，表“特点”，为可数名词。故填characteristics。 11．In other words, ideal life doesn’t always consist with the (real). 【答案】reality 【详解】考查名词。句意：换句话说，理想的生活并不总是与现实相符。由空前the定冠词可知，此处为名词形式作宾语成分。故填reality。 12．In order to make more progress, we have no alternative but (make) full use of spare time. 【答案】to make 【详解】考查固定搭配。句意：为了取得更大的进步，我们别无选择，只能充分利用业余时间。have no alternative but to do sth.固定搭配，意为“别无选择不得不做某事”，故填to make。 13．He has a delicate (digest) and cannot eat oily food. 【答案】digestion 【详解】考查名词。句意：他的消化系统很脆弱，不能吃油腻的食物。此处应用名词digestion作宾语，表示“消化系统”，为可数名词，由a可知，应用单数，故填digestion。 14． (provide) that you finish your work, you may go. 【答案】Provided/Providing 【详解】考查条件状语从句。句意：如果你完成了工作，你就可以走了。分析句式结构可知，本句的主句为you may go，所以前面应该是从句部分，再根据提示词可知，此处用provided that或者providing that表示“如果、只要”来引导条件状语从句。故填Provided/Providing。 15．What he needs most (be) money. 【答案】is 【详解】考查时态和主谓一致。句意：他最需要的是钱。根据从句时态可知，主语时态用一般现在时。从句作主语，根据money，谓语动词用单数形式。故填is。 16．It is the first time that China and Brazil (tackle) the climate crisis together. 【答案】have tackled 【详解】考查时态。句意：这是中国和巴西首次共同应对气候危机。It is the first time that...句型中，从句通常用现在完成时，主语China and Brazil是复数，助动词用have。故填have tackled。 17．Communication between employees in this cafe is done (entire)through sign language, creating a quiet atmosphere that customers appreciate. 【答案】entirely 【详解】考查副词。句意：这家咖啡馆的员工之间完全通过手语进行沟通，营造出顾客欣赏的安静氛围。分析句子可知，此空应填副词作状语，修饰前面动词，entirely，表“完全地”，为副词，符合语境。故填entirely。 18．A microwave cooks food much faster than a (convention) oven. 【答案】conventional 【详解】考查形容词。句意：微波炉比传统的烤箱做饭快得多。形容词conventional作定语修饰名词。故填conventional。 19．He quickly assessed what (alternative) were open to him. 【答案】alternatives 【详解】考查名词的数。句意：他很快评估了自己有哪些选择。alternative是可数名词，根据were可知，此处要用复数形式，在what引导的宾语从句中作主语，故填alternatives。 20．Tourism is double-edged, (boost) the economy but damaging the environment. 【答案】boosting 【详解】考查非谓语动词。句意：旅游业是一把双刃剑，它促进了经济，但也破坏了环境。句子主干成分完整，空处和damaging并列，为非谓语，boost“推动，使增长”和Tourism逻辑上是主动关系，因此用boost的现在分词形式，作状语。故填boosting。 2、 根据句意及首字母或汉语提示完成单词(本大题共20小题，每小题1.5分，共30分) 1．My friend recommend me a good Italian restaurant in the (市区的) area. 【答案】downtown/urban 【详解】考查形容词。句意：我的朋友向我推荐了市中心一家不错的意大利餐厅。根据汉语提示“市区的”可知，用形容词downtown/urban作定语修饰名词area，故填downtown/urban。 2．By 2028, two-thirds of the world’s population may face water s (短缺). 【答案】shortage/hortage 【详解】考查名词。句意：到2028年，全球三分之二的人口可能面临水资源短缺。根据句意和首字母及汉语提示可知，空处应填名词shortage“短缺”作宾语，此处表抽象概念，不可数。故填shortage。 3．The community garden focuses on growing o (有机的，绿色的) vegetables for local families. 【答案】organic/rganic 【详解】考查形容词。句意：社区花园专注于为当地家庭种植有机蔬菜。根据首字母o及汉语提示“有机的，绿色的”可知，本空用形容词organic，修饰vegetables，作前置定语。故填organic。 4．In the speech, he explained some of the positive (方面) of technological development. 【答案】aspects 【详解】考查名词。句意：在演讲中，他解释了科技发展的一些积极方面。“方面”是aspect，空前有some，空格处用复数，故填aspects。 5．Speed is the e (必不可少的、基本的) ingredient of all athletics. 【答案】essential/ssential 【详解】考查形容词。句意：速度是所有田径运动的基本要素。根据中英文提示可知，此处使用形容词essential“必不可少的，基本的”，作定语，修饰名词ingredient。故填essential。 6．The failure of the peace talks set off a chain of (危机). 【答案】crises 【详解】考查名词。句意：和谈的失败引发了一连串的危机。“危机”是crisis，空前有a chain of可知，空格处用复数crises，故填crises。 7．As is known, heating a copper bar will cause it to (使扩大). 【答案】expand 【详解】考查动词。句意：众所周知，加热铜棒会使其膨胀。根据汉语提示“使扩大”可知，本空用动词expand，位于不定式符号to后，用expand的原形。故填expand。 8．His explanation was e (完全地；彻底地) different from what I had expected. 【答案】entirely/ntirely 【详解】考查副词。句意：他的解释与我原先的预期完全不同。根据汉语提示和首字母e以及空格后的形容词different可知，空格处应该用副词entirely作状语，修饰后面的形容词different。故填entirely。 9．It is reported that the plan had received (广泛的) support throughout the country. 【答案】widespread 【详解】考查形容词。句意：据报道，该计划在全国范围内获得了广泛的支持。根据句意和中文提示可知，表示“广泛的”应用widespread，为形容词，在本句中作定语，修饰后面名词。故填widespread。 10．Despite her family’s (贫穷), she managed to excel in school and earn a scholarship to university. 【答案】poverty 【详解】考查名词。句意：尽管家境贫寒，她仍在学校表现优异，并获得了大学奖学金。根据汉语提示“贫穷”及空前的所有格“family’s”可知，此处应填名词poverty，为不可数名词作介词Despite的宾语。故填poverty。 11．If the restaurant is full, we can consider the Italian place as an (可供选择的事物). 【答案】alternative 【详解】考查名词。句意：如果餐厅客满，我们可以考虑去意大利餐厅。设空处使用名词作宾语，表示“可供选择的事物”用名词alternative。故填alternative。 12．The whole argument rests on a false (假设). 【答案】assumption 【详解】考查名词。句意：整个论证建立在一个错误的假设之上。此处应为名词作宾语，根据提示的汉语可知，表示“假设”应为assumption，且空前有一个不定冠词a，所以此处使用名词单数。故填assumption。 13．I am fully convinced that the l (闲暇) lifestyle is undergoing a decline with the progress of modern society. 【答案】leisure/eisure 【详解】考查名词。句意：我坚信，随着现代社会的进步，闲暇生活方式正在衰落。“闲暇”为名词leisure作定语，修饰名词lifestyle，故填leisure。 14．Hot days are (典型的，特有的) weather of the summer months. (根据汉语提示单词拼写) 【答案】characteristic 【详解】考查形容词。句意：炎热的日子是夏季的典型天气。根据汉语提示“典型的，特有的”可知，空格处应用单词“characteristic”，意为“典型的，特有的”，形容词词性，作定语。故填characteristic。 15．It took many hours to (使信服) the court of his guilt. 【答案】convince 【详解】考查动词。句意：花了好几个小时才使法庭相信他有罪。空前的to是不定式的标志，所以空处应填动词原形，根据所给中文提示词，应是convince意为“使信服”，构成固定搭配convince sb of sth。故填convince。 16．An important (特征) of Van Gogh’s paintings is their bright colors 【答案】characteristic 【详解】考查名词。句意：梵高画作的一个重要特征是它们色彩鲜艳。根据汉语提示“特征”可知，此处使用名词characteristic，由空前的An可知，应用名词单数形式，作主语，故填characteristic。 17．D (致力于) himself to bringing up the secret of nature, the young scientist has little time for entertainment. 【答案】Devoting/evoting 【详解】考查非谓语动词。句意：这位年轻的科学家致力于揭示大自然的秘密，几乎没有时间娱乐。devote oneself to doing sth.致力于做某事。因为这里作状语，且devote与主语the young scientist是逻辑主动关系，所以用现在分词形式，首字母大写。故填Devoting。 18．Considerable efforts (奉献，投入) to providing tourists with a better travel experience, Harbin has become an attractive tourism destination. 【答案】devoted 【详解】考查动词。句意：哈尔滨为了给游客提供更好的旅游体验付出了巨大努力，现已成为一个有吸引力的旅游目的地。根据汉语提示“奉献，投入”可知，应用动词devote，devote...to...表示“把……奉献于，把……投入到……”。句中已有谓语动词has become，所以此处 应用非谓语形式；efforts与 devote之间是被动关系，所以用过去分词形式，作定语，故填devoted。 19．The new manager was hired to t (处理；解决) the company’s financial crisis. 【答案】tackle/ackle 【详解】考查动词。句意：新经理被聘用是为了解决公司的财务危机。根据句意和汉语提示“处理；解决”以及首字母t可知，空处应填动词tackle，且空前有不定式符号to，所以这里用动词原形。故填tackle。 20．Today, it is estimated that about 60 percent of domestic rice (消费) in China is comprised of hybrid rice. 【答案】consumption 【详解】考查名词。句意：今天，据估计，中国国内消费的大米中约有60%是杂交水稻。根据汉语提示“消费”可知，此处为名词consumption，作宾语，表抽象概念，不可数。故填consumption。 3、 完成句子(本大题共15小题，每小题2分，共30分) 1．The injured bird managed to fly again after treatment, and this is amazing. (用“名词性从句”句式改写句子) 【答案】It is amazing that the injured bird managed to fly again after treatment. 【详解】考查主语从句。句意：这只受伤的鸟经过治疗后又能飞起来，真是令人惊讶。根据句意以及句子的要求提示可知，原句表达的意思是 、“受伤的鸟在治疗后设法再次飞翔，这很令人惊奇”。要改写成名词性从句的句式，这里使用主语从句。在英语中，当主语从句较长，而谓语较短时，常用 it 作形式主语，真正的主语（主语从句）放在后面。原句中“the injured bird managed to fly again after treatment（受伤的鸟在治疗后设法再次飞翔）” 这一整句话作为主语从句，放在 that 后面。而it作形式主语放在句首，构成“It is +形容词 + that -从句”的结构，这里形容词是“amazing”，所以改写后的句子就是“It is amazing that the injured bird managed to fly again after treatment.”。故答案是It is amazing that the injured bird managed to fly again after treatment. 2．不管他来还是不来，都没有关系。（whether） makes no difference. 【答案】Whether she comes or not 【详解】考查主语从句。分析句子可知，句子需用“whether...or not”结构引导主语从句，表示“不管是否……”。“Whether he comes or not”作为主语，符合“whether +主语 +谓语 + or not”的固定搭配，且谓语动词“makes”与单数主语一致。故填Whether she comes or not。 3．He (战胜了疾病) with the help of his family. (根据汉语提示完成句子) 【答案】overcame the disease 【详解】考查动词短语和时态。句意：在家人的帮助下，他战胜了疾病。“战胜疾病”用动词短语overcome the disease。根据语境可知事情发生在过去，用一般过去时。故填overcame the disease。 4．Andy was appointed to head the research team that (由……组成) dozens of experts from Cambridge. (根据汉语提示完成句子) 【答案】 was composed/comprised of 【详解】考查动词短语。句意：安迪被任命为研究小组的负责人，该小组由来自剑桥的数十名专家组成。结合所给空数可知，“由……组成”应用动词短语be composed of或be comprised of，结合“was appointed”可知，从句描述过去的情况，时态应用一般过去时，关系代词that替代先行词the research team在从句中作主语，是整体的单数概念，be动词应用was。故填was composed/comprised of。 5．After hundreds of failed experiments, they (偶遇一种有希望的化学品). (根据汉语提示完成句子) 【答案】came across a promising chemical 【详解】考查时态和形容词、名词。句意：经过数百次失败的实验，他们偶遇一种有希望的化学品。表示“偶遇”用come across，表示“一种有希望的化学品”用a promising chemical，句子描述过去发生的事情用一般过去时。故填came across a promising chemical。 6．Increased investment in new technologies will, (相应地), lead to increased profits. （根据汉语提示完成句子） 【答案】in turn 【详解】考查固定短语。句意：对新技术的投资增加相应地将会导致利润的增加。根据汉语提示“相应地”，可知应填入固定短语in turn，在句中作状语，修饰动词短语lead to 。故填in turn。 7．他别无选择，只能让自己对袁的耕作方法有更多的了解。（have no alternative but to do） He Yuan’s farming methods. 【答案】had no alternative but to equip himself with more knowledge of 【详解】考查时态。事情已发生，时态用一般过去时，have no alternative but to do (别无选择只能做)，equip oneself with sth. (用某物装备自己)，more knowledge of (……的更多的了解)。故填had no alternative but to equip himself with more knowledge of。 8．It doesn’t matter . 在这家商店中用现金或信用卡支付都可以。 【答案】whether you pay by cash or credit card in this store 【详解】考查主语从句和时态。根据doesn’t matter可知，句子时态为一般现在时；it为形式主语，空处为句子真正的主语，表示“是否”可用whether引导主语从句；表示“你”可用代词you，作主语从句的主语；表示“用……支付”可用动词短语pay by...，作从句的谓语动词。表示“现金或信用卡”可用短语cash or credit card，作介词by的宾语；表示“在这家商店中”可用介词短语in this store，作地点状语。故填whether you pay by cash or credit card in this store。 9．We should keep the Earth healthy its natural resources. 当我们利用自然资源的时候, 我们应该保持地球的健康。 【答案】while using 【详解】考查状语从句的省略。“当我们利用自然资源的时候”可以写成while引导的时间状语从句，“利用”为动词use，从句表示的是我们正在利用自然资源的时候，描述现在进行的事情，应用现在进行时，翻译为while we are using its natural resources，当从句和主句为同一主语，且从句含有be动词时，从句可以省略主语和be动词，即为while using，故填while using。 10．What I can do now is give you . 我现在能做的是给你一个大致相近的估计。 【答案】 a ballpark estimate 【详解】考查形容词和名词。“一个”用不定冠词a或an表示；“大致相近的”用形容词ballpark表示；“估计”用名词estimate作宾语；ballpark的发音是辅音音素开头，不定冠词用a。故填a；ballpark；estimate。 11． (让他感到满意的) was that his students were able to read, speak and write in English. (根据汉语提示完成句子) 【答案】What made him feel satisfied 【详解】考查名词性从句和形容词。句意：让他感到满意的是，他的学生能够用英语读、说、写。根据was可知，此处描述过去发生的事情，用一般过去时。表示“让他感到满意的”用主语从句what made him feel satisfied，连接代词what引导从句，作主语，意为“……的事”，make意为“让”，作谓语，“他”作宾语，“感到满意的”为形容词作表语，“满意的”用形容词satisfied，句首字母大写。故填What made him feel satisfied。 12．I to see a doctor. 我试图说服他去看病。 【答案】tried to convince him 【详解】考查动词短语。根据中文提示可知，表示“试图说服他”应用try to convince him，其中try to do sth.表“努力去做某事”，为固定搭配，结合所给汉语可知句子用一般过去时态表过去情况。故填tried to convince him。 13．据估计，可能有十分之一的心脏病由缺乏锻炼引起，并且缺乏锻炼会导致大多数健康问题。 lack of exercise could be responsible for one in ten cases of heart disease and cause most of the health problems. 【答案】It is estimated that 【详解】考查固定句型。根据中文提示可知，表示“据估计”应用it is estimated that，为固定句型，句子使用一般现在时表客观情况，it在本句中作形式主语， that引导主语从句，作真正的主语，it置于句首，首字母大写。故填It is estimated that。 14．To get this job, you must (使我相信你的能力) before you are employed. (根据汉语提示完成句子) 【答案】convince me of your ability 【详解】考查动词短语。句意：要获得这份工作，你必须在被录用之前使我相信你的能力。根据上文“To get this job(要获得这份工作)”可知，空白处需要一个表示“使我相信你的能力”含义的动词短语。根据汉语提示，“使……相信……”用“convince...of...”，“你的能力”用“your ability”，因空白处前面有情态动词，空白处填动词原形，故填convince me of your ability。 15．Mr Bacon has been working in the school for about 20 years, （把他所有的精力都投入到教学和研究中）. (根据汉语提示完成句子) 【答案】devoting all his energy to teaching and researching 【详解】考查名词和动名词和短语。句意：培根先生在这所学校工作了大约20年，他把所有的精力都投入到教学和研究中。表示“把……投入到”可用短语devote to，又因为devote和主语之间是主动关系，所以用短语的现在分词形式作状语；表示“他所有的精力”可用短语all his energy；表示“教学和研究”可用动名词teaching and researching作介词to的宾语。故答案为devoting all his energy to teaching and researching. ( 8 / 9 学科网（北京）股份有限公司 ) 学科网（北京）股份有限公司 $$