Unit 1 Encyclopaedias 单元话题语法填空练习-2024-2025学年八年级英语上册单元重难点易错题精练（沪教牛津版）

Unit 1 Encyclopaedias 单元话题语法填空练习 （22-23八年级上·广东深圳·期中）Pliny the Elder (老普林尼) wrote the 1 (one) encyclopedia with the help of his nephew. This work is made up of 37 books and had many 2 (subject) such as anthropology (人类学) and painting. Through the following few centuries, encyclopedia were connected to religion. The first Christian edition appeared in 560 AD, 3 the first Muslim volume came to light soon after. One of 4 (long) encyclopedia ever was produced in 1403 when The Yongle Encyclopedia appeared in China. It had 11,095 volumes. Most of the original work 5 (lose) through the centuries, and people can see less than 400 volumes today. The word “encyclopedia” coming from Greek 6 (mean) “a general knowledge”. It has been in use 7 at least 500 years. In 8 20th century, the Encyclopedia Britannica became the most well known 9 (west) work of this type. At the same time, topical encyclopedia became the most popúlar, covering different topics. At the end of the century, many publishers began to publish 10 (they) in digital formats such as Compact Discs (CDs) and Digital Versatile Discs (DVDs). （22-23八年级上·广东深圳·期末）阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式，并将答案写在答题卡规定的位置上。 How much do you know about Antarctica(南极洲)? Antarctica is the coldest, windiest 11 emptiest place in the world. There is little rain all year round, and it is one of the world’s 12 (dry) places. It is also home to penguins and 13 (difference) sea life along its coast. Cold weather over millions of years has made it very icy. In some places, the ice is about 1.9 km thick. Humans 14 (explore) Antarctica for many years. It is said that the first man to reach Antarctica was John Davis, 15 US seal hunter. After that, thousands of tourists visit the coast of Antarctica during the summer. 16 is from November to February. They get there 17 (see) penguins, seals, whales and a beautiful icy view. Do you know who lives and works in Antarctica? They are 18 (most) scientists and their assistants. The Polar Program in the US 19 (support) the study of Antarctica. It sends more than 100 scientists to Antarctica each year. In Antarctica, some scientists study the 20 (move) of glaciers(冰川) and the activity of volcanoes(火山). Other scientists study animals like whales, seals, birds and fish. （21-22八年级上·广东深圳·期末）根据句子意思，用所给单词的适当形式填空，未提供单词的根据上下文填入适当的词。 The rattlesnake is a poisonous (有毒的) American snake. When it is angry or afraid, it makes a noise like a rattle (响板) 21 its tail. It’s very scary. But Heather and her husband make a living in an 22 (usual) way. They catch snakes, especially rattlesnakes. Heather says her work is protecting people from rattlesnakes and protecting rattlesnakes from people. She does her job very 23 (care). Rattlesnakes often come face to face with people in houses or gardens. Many people are afraid of 24 (they). Heather explains that it’s not the snakes that are moving into these places. It’s 25 other way round. The snakes lived in these places first and then the people built houses. Also, 26 you stand away, they will go away quietly. So just keep clam. It is Heather’s 27 (twelve) year as a snake catcher. However, for so many years, she 28 (touch) a snake only once. In most cases, she picks up the snakes with a special tool. This doesn’t hurt them, but it keeps them at a safe 29 (distant). Heather and her husband are very busy because they are never off duty. Few people would like 30 (do) this job, but Heather enjoys it. “I love my job,” she says. （23-24八年级上·江苏泰州·期末）根据短文内容，在空白处填上适当单词，使短文完整、通顺。给出单词的空格不限一词，没有给出单词的空格限一词。 China showed its power (实力) at the ISU Short Track Speed Skating (短道速滑) World Cup in Montreal, Canada. It took place from Oct 20 to 22. China won its 31 (one) gold medal of the season in the mixed 2000m relay (接力) on Oct 21, with the great 32 (support) of Gong Li, Zang Yize, Liu Shaolin and Liu Shaoang. Liu Shaoang also won 33 men’s 500m final on Oct 22. 34 you watch the competition, you will like the rocket-like start of the skaters. It needs the skaters 35 (use) great explosive power (爆发力). Short track speed skating is all about speed. As they skate 36 the track, top skaters can reach the speed of 50 km an hour. They shift (转移) their 37 (weigh) between their legs and reach out their hands to keep up speed. Skaters are 38 (able) to overtake (超越) others at any point during the race, or there will be bad results. Short track speed skating came about in Canada in the 1880s, but grew popular in Asia in the 1990s. According to Xinhua (新华社), China, South Korea and Canada are 39 (good) performers at the World Short Track Speed Skating Championships. Team China 40 (get) ready for the Milano Cortina 2026 Winter Olympics now. “The new season at ISU is a chance to train both new and old players for the coming games. It’s better for them to take action right now” Zhang Jing, the coach of the national team, told Xinhua. （23-24八年级上·江苏常州·期末）阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。 What is the best season to visit the Amazon Rainforest (亚马逊雨林)? This is a common question we get from people visiting the rainforest for the 41 (one) time. The answer is any time. There is a wet season and a dry season in the rainforest. There is no time that is 42 (good) than the other. Both offer beautiful sights and amazing chances (机会) to see plant and animal life, hot weather and some 43 (rain) days. The wet season is from November 44 April. During the time, the rainforest gets 60% of the total rainfall, so it is cool and wet. Also, because of the rain, the water in the river 45 (rise) and there is a flood in the forest. That means you can take a boat and travel through the forest. Since you are closer to the top of the trees, you will see beautiful birds, 46 (monkey) and many other animals. The dry season is between May and October. This is the warm season, 47 a temperature of about 36°C． However, it still gets some heavy rains. A key difference is that the land comes out, so people can go to the forest 48 foot. During these months, it is much easier to find snakes and 49 (fish) is much easier too. You may not be able 50 (see) the birds in the trees, but you will see them flying in the sky. Which season would you like to come to the rainforest? （23-24八年级上·辽宁葫芦岛·期末）阅读短文，在空白处填入一个适当的单词或用括号内所给词的正确形式填空，使短文通顺、连贯。 We usually think fish can’t talk. But there are a lot of sounds under the sea. In fact, scientists believe that all sea animals, or more than 250,000 51 (kind), can “speak”! “We can hear animals all around us,” UK scientist Steve Simpson told the BBC． Of all the sea animals, coral reefs (珊瑚礁) are 52 (loud) in the ocean. Scientists can tell if it’s healthy after 53 (listen) to it. When some coral reefs died in 2015 and 2016, they 54 (become) quiet. Clownfish (小丑鱼) make short sounds when going after small clownfish, 55 they want to show they are strong. Damselfish (小热带鱼) surprise other fish by 56 (quick) opening and closing its mouth. Mother dolphins (海豚) can use a special sound to talk to 57 (they) babies. The sound is just the same 58 “I’m here”. Now scientists are building 59 online library to get sounds from all over the world. They plan 60 (study) the sounds. Humans also need to understand the sounds from underwater animals before they die out (灭绝). （22-23八年级上·湖南株洲·期末）阅读下面的短文，在空白处填入1个合适的单词或括号内单词的正确形式。 We all know that water is the source (源泉) of life on Earth. No plant, animal 61 human can live without it. 62 new study shows how important drinking water is for 63 (we) to live longer. Scientists found that if people drank a lot of water every day, they would be 64 (healthy) and would live longer. And these people developed fewer serious health 65 (problem) with age. They added that adults (成年人) who did not drink enough water might die at a younger age. These people were much easier to show signs (迹象) of 66 (get) old. Scientists also 67 (study) the information of some older patients. These patients visited a hospital for about five times. One of the scientist, Dr Natalia Dmitrieva, said, “The results show that proper water may help slow down aging.” She advised people 68 (drink) more water and juice and eat more fruit and vegetables. She added that an adult 69 (need) to drink at least 1.5 liters (升) of water every day. Half 70 the people all around the world do not drink enough. （23-24八年级上·辽宁本溪·期末）阅读短文，在空白处填入一个适当的单词或用括号内所给词的正确形式填空，使短文通顺、连贯。 Do you often forget where your socks are when you wake up in the morning? Can you remember what you 71 (eat) for lunch a week ago? You may think that it 72 (be) not a good thing to forget. But now you should be thankful. Scientists found that forgetting is 73 important part of learning. Getting rid of (除掉) unnecessary information can help our brains (大脑) work 74 (well) than before. What kind of information is unnecessary? The environment is important. When our environment is always changing, our brains may want us to remember fewer 75 (thing). For example, a supermarket cashier (收银员) meets many people every day and probably will only remember 76 (they) for a short time. Our brains keep making new neurons (神经元). There is a special place 77 our brains called the hippocampus (海马体). It is important for us 78 (learn) and remember. When new neurons go into the hippocampus, they get rid of old things in our brains. So we forget so much information about the time when we were very young. 79 , it is not always good if you keep forgetting things. When you don’t have enough sleep, you 80 (usual) have a hard time remembering new information. Sleep helps the brain store and keep new information. So keeping enough sleep is very important. 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 参考答案： 1．first 2．subjects 3．and 4．the longest 5．has been lost 6．means 7．for 8．the 9．western 10．them 【导语】本文主要介绍了百科全书的历史和发展。 1．句意：老普林尼在侄子的帮助下写了第一部百科全书。此处指“第一部百科全书”，用序数词first“第一”。故填first。 2．句意：这部作品由37本书组成，涉及人类学和绘画等多个学科。many后加可数名词复数subjects“科目”。故填subjects。 3．句意：第一本基督教版本出现在公元560年，不久后第一本穆斯林版本出版。根据“The first Christian edition appeared in 560 AD...the first Muslim volume came to light soon after”可知前后两个句子是并列关系，用and连接。故填and。 4．句意：有史以来最长的百科全书之一产生于1403年，当时《永乐百科全书》出现在中国。one of the+最高级+名词复数“最……的……之一”。故填the longest。 5．句意：几个世纪以来，大部分原作都已失传。主语Most of the original work和谓语lose之间是被动关系，根据“through the centuries”可知此处用现在完成时的被动语态have/has been done，主语是不可数名词，助动词用has。故填has been lost。 6．句意：“百科全书”一词来自希腊语，意思是“常识”。分析句子可知，此处作谓语动词，句子描述客观情况，用一般现在时，主语是名词单数，谓语动词用单三。故填means。 7．句意：它已经使用了至少500年。空格后是时间段，用介词for。故填for。 8．句意：在20世纪，《大英百科全书》成为这类最著名的西方作品。空格后是序数词，此处用定冠词the。故填the。 9．句意：在20世纪，《大英百科全书》成为这类最著名的西方作品。修饰名词work用形容词western“西方的”。故填western。 10．句意：在本世纪末，许多出版商开始以数字格式出版它们。此处作动词publish的宾语用代词宾格them。故填them。 11．and 12．driest 13．different 14．have explored 15．a 16．It 17．to see 18．mostly 19．supports 20．movement 【导语】本文主要讲了研究者对于南极洲的研究。 11．句意：南极洲是世界上最冷、风最大、最空旷的地方。根据“the coldest, windiest….emptiest”可知三个形容词是并列关系，用and连接，故填and。 12．句意：这里一年四季几乎没有降雨，是世界上最干旱的地方之一。根据“one of the world’s...places”可知是指世界上最干燥的地方之一，“one of+名词所有格+形容词最高级”表示“……的最……之一”，故填driest。 13．句意：这里也是企鹅和不同海洋生物的家园。根据“…sea life along its coast”可知是指沿岸有不同的海洋生物，空处应填形容词different修饰名词“sea life”，故填different。 14．句意：人类探索南极洲已经很多年了。根据“for many years”可知时态此处是现在完成时。主语“Humans”是复数，后接“have+过去分词”，故填have explored。 15．句意：据说第一个到达南极洲的人是美国海豹猎人约翰·戴维斯。根据“…US seal hunter”可知是指一个美国海豹猎人，此处表泛指，US发音以辅音音素开头，故填a。 16．句意：从11月到2月。根据“…from November to February”可知指的是前文参观南极洲海岸是从11月到2月，应用代词it指代，故填It。 17．句意：他们去那里看企鹅、海豹、鲸鱼和美丽的冰景。根据题干，可知是指：他们到那里去看企鹅、海豹、鲸鱼和冰景，此处应用不定式表目的，故填to see。 18．句意：他们主要是科学家和他们的助手。根据“They are…scientists and their assistants.”可知空处应填副词，most的副词形式为mostly“主要地”，副词mostly修饰“are”，故填mostly。 19．句意：美国的极地计划支持对南极洲的研究。根据题干可知，空处缺谓语动词，本文时态为一般现在时，主语“The Polar Program in the US”为单数，谓语动词用第三人称单数形式，故填supports。 20．句意：在南极洲，一些科学家研究冰川的运动和火山的活动。根据“some scientists study the…of glaciers”可知此处考查“the+名词+of”的结构，move的名词形式为movement，故填movement。 21．with 22．unusual 23．carefully 24．them 25．the 26．if 27．twelfth 28．has touched 29．distance 30．to do 【导语】本文主要是介绍捕蛇者Heather和她的丈夫对响尾蛇的保护。 21．句意：当它生气或害怕的时候，它用它的尾巴发出像拨浪鼓一样的声音。根据“its tail”可知用尾巴发出声音，空格处需要介词with，故填with。 22．句意：但是Heather和她的丈夫以一种不同寻常的方式谋生。根据“They catch snakes, especially rattlesnakes.”可知他们的谋生方式不寻常，空格处需要填形容词“不同寻常的”，即unusual，故填unusual。 23．句意：她工作非常小心。根据“does her job”可知空格处应填副词，care的副词形式是carefully，故填carefully。 24．句意：很多人都害怕它们。根据“of”可知空格处需要填they的宾格形式，即them，故填them。 25．句意：事实恰好相反。根据“it’s not the snakes that are moving into these places.”和“The snakes lived in these places first and then the people built houses.”可知不是蛇进入了人类的地方，而是人类进入了蛇生活的地方，所以情况恰恰想法，空格处需要填定冠词the，故填the。 26．句意：而且，如果你走开，它们会悄悄地离开。根据“they will go away quietly.”可知是在假设，空格处应填if，故填if。 27．句意：这是Heather作为捕蛇者的第十二年。根据“year as a snake catcher”可知是第十二个年头，空格处需要填序数词，twelve的序数词是twelfth，故填twelfth。 28．句意：然而，这么多年来，她只碰过一次蛇。根据“for so many years”可知原句是指从过去到现在，需要用现在完成时态，即has/have done，主语是she，空格处应填has touched，故填has touched。 29．句意：这不会伤害它们，但会让它们保持安全距离。根据“at a safe”可知空格处应填名词单数，distant的名词形式是distance，故填distance。 30．句意：很少有人愿意做这份工作。would like to do sth.“想要做某事”，是固定搭配，空格处应填to do，故填to do。 31．first 32．support 33．the 34．If/When 35．to use 36．around/along 37．weight 38．unable 39．the best 40．is getting/are getting 【导语】本文介绍了中国在加拿大蒙特利尔举行的国际滑联短道速滑世界杯上取得的成绩及短道速滑这一运动的特点。 31．句意：10月21日，在巩俐、臧一泽、刘少麟和刘少昂的大力支持下，中国队在2000米混合接力赛中获得了本赛季首枚金牌。根据“gold medal of the season in the mixed 2000m relay (接力) on Oct 21”可知，这里是夺得本赛季首枚金牌，用one的序数词first。故填first。 32．句意：10月21日，在巩俐、臧一泽、刘少麟和刘少昂的大力支持下，中国队在2000米混合接力赛中获得了本赛季首枚金牌。根据“Gong Li, Zang Yize, Liu Shaolin and Liu Shaoang.”可知，这里是在他们的大力支持下，support意为“支持”，这里是名词。故填support。 33．句意：刘少昂也在10月22日的男子500米决赛中获胜。根据“men’s 500m final on Oct 22.”可知，这里表示特指，用定冠词the。故填the。 34．句意：如果（当）你观看比赛时，你会喜欢滑冰运动员火箭般的起跑。根据“you watch the competition,”可知，这里是由If引导的条件状语从句或When引导的时间状语从句。故填If/When。 35．句意：它需要滑冰运动员使用巨大的爆发力。根据“needs the skaters”可知，这里是：need sb. to do sth.“需要某人做某事”，use的动词不定式为to use。故填to use。 36．句意：当他们在跑道上滑冰时，顶尖的滑冰运动员可以达到每小时50公里的速度。根据“they skate…the track,”可知，这里是在跑道上滑冰时，around意为“环绕”；along意为“沿着”。这两个词语都可以。故填around/along。 37．句意：他们将重心转移到两腿之间，伸出双手以保持速度。根据“between their legs”可知，这里是将重心转移到两腿之间，需用weigh的名词weight，意为“重量”。故填weight。 38．句意：滑冰运动员在比赛中的任何时候都不能超过其他人，否则会有糟糕的结果。根据“or there will be bad results.”可知，这里是不能超过其他人，用able的反义词unable，意为“不能”。故填unable。 39．句意：据新华社报道，中国、韩国和加拿大是世界短道速滑锦标赛上表现最好的国家。根据“performers at the World Short Track Speed Skating Championships.”可知，这里指中国、韩国和加拿大是世界短道速滑锦标赛上表现最好的国家，用good的最高级best，前面用定冠词the。故填the best 40．句意：中国队正在为2026年米兰科尔蒂纳冬奥会做准备。根据“now”可知，这里是现在进行时，主语Team China是单数，也可以是复数，因此be动词用is或are，get的现在分词为getting。故填is getting/are getting。 41．first 42．better 43．rainy 44．to 45．rises 46．monkeys 47．with 48．on 49．fishing 50．to see 【导语】本文主要介绍了亚马逊雨林。 41．句意：这是我们从第一次参观雨林的人那里得到的一个常见的问题。根据“people visiting the rainforest for the...(one) time”可知，此处表示“第一次参观雨林的人”，空处应用one的序数词first。故填first。 42．句意：没有哪一个时间比另一个时间更好。根据空后的“than”可知，空处应用good的比较级形式，故填better。 43．句意：这两个季节都有美丽的风景，都会有美妙的机会看到植物和动物，天气炎热，有时还会下雨。根据“some...(rain) days”可知，空后是名词days，空处应用形容词rainy”下雨的“，作定语。故填rainy。 44．句意：雨季是从11月到次年4月。根据“from November...April”可知，此处应是from...to...“从……到……”。故填to。 45．句意：此外，由于下雨，河水上涨，森林里发生洪灾。根据“the water in the river...(rise) and there is a flood in the forest”可知，句子用一般现在时，主语是不可数名词“water”，谓语动词应用三单形式，故填rises。 46．句意：你会看到美丽的鸟、猴子与许多其他动物。根据“birds, ...(monkey) and many other animals”可知，空处也应用“monkey”的复数形式，表泛指。故填monkeys。 47．句意：这是温暖的季节，气温约为36摄氏度。根据“This is the warm season, ...a temperature of about 36°C.”可知，此处表伴随，空处应用介词with“具有”。故填with。 48．句意：所以人们可以走路去森林。on foot“步行”，是固定短语。故填on。 49．句意：在这几个月里，更容易找到蛇，钓鱼也更容易了。根据“...(fish) is much easier too”可知，此处应是表示“更容易钓鱼了”，句子缺少主语，空处应是fishing“钓鱼”。故填fishing。 50．句意：你可能看不到树上的鸟，但你会看到它们在天空中飞翔。be able to do sth.“能够做某事”，空处应是to see。故填to see。 51．kinds 52．loudest 53．listening 54．became 55．because 56．quickly 57．their 58．as 59．an 60．to study 【导语】本文主要讲述了科学家发现海洋生物也有自己的语言并开始研究它们的语言。 51．句意：事实上，科学家们相信所有的海洋生物，或者超过250000种，可以“说话”。kind“种类”，可数名词，前面有“250,000”修饰，此处应用复数形式。故填kinds。 52．句意：所有海洋生物之中，珊瑚礁是海洋中最大声的。根据“Of all the sea animals”可知，此处需用最高级，loud“大声的”，最高级为loudest。故填loudest。 53．句意：科学家在听完声音后可以判断它是否是健康的。after是介词，后面需用动名词。故填listening。 54．句意：当一些珊瑚礁在2015和2016年死亡时，它们变得很安静。根据“died”可知此处用一般过去时became“变得”。故填became。 55．句意：小丑鱼在追逐小小丑鱼时会发出短促的声音，因为它们想展示自己的强壮。根据“Clownfish (小丑鱼) make short sounds when going after small clownfish,...they want to show they are strong.”可知，前后表示因果关系，用because引导原因状语从句。故填because。 56．句意：小热带鱼通过快速地开合自己的嘴巴使其它鱼类觉得惊讶。quick“快的”，形容词，此处用副词修饰动词surprise。故填quickly。 57．句意：海豚妈妈可以用一种特殊的声音和它们的宝宝说话。they“它们”，空处修饰名词babies，用形容词性物主代词。故填their。 58．句意：声音就好像是说“我在这里。”the same as“和……一样”，固定搭配。故填as。 59．句意：现在科学家们正在建立一间网上图书馆，以此来收集来自全世界的声音。此处泛指一间图书馆，需用不定冠词，online是以元音音素开头的，不定冠词用an。故填an。 60．句意：他们计划研究声音。plan to do“计划做某事”，固定搭配，空处应用动词不定式。故填to study。 61．or 62．A 63．us 64．healthier 65．problems 66．getting 67．studied 68．to drink 69．needs 70．of 【导语】本文主要介绍了多喝水有助于健康长寿。 61．句意：没有植物、动物或人类可以离开它而生存。根据“plant, animal ... human”可知，此处是表并列，由“No”可知，否定句中or连接。故填or。 62．句意：一项新的研究表明，喝水对我们长寿是多么重要。根据“new study”可知，是指一项新的研究，new是以辅音音素开头的单词，空处用不定冠词a表示，句首单词首字母大写。故填A。 63．句意：一项新的研究表明，喝水对我们长寿是多么重要。for是介词，后跟人称代词的宾格us，作宾语。故填us。 64．句意：科学家发现，如果人们每天喝大量的水，他们会更健康，也会更长寿。根据“would live longer”可知，空处用形容词的比较级形式healthier“更健康的”。故填healthier。 65．句意：而且随着年龄的增长，这些人很少出现严重的健康问题。fewer后跟可数名词的复数形式。故填problems。 66．句意：这些人更容易出现衰老的迹象。of是介词，后跟动名词。故填getting。 67．句意：科学家们还研究了一些老年患者的信息。根据“These patients visited a hospital for about five times.”可知，此处是描述过去的事情，时态用一般过去时，动词用过去式studied。故填studied。 68．句意：她建议人们要多喝水和果汁，多吃水果和蔬菜。advise sb to do sth“建议某人做某事”，空处用不定式作宾语补足语。故填to drink。 69．句意：她补充说，一个成年人每天至少需要喝1.5升的水。根据“every day”可知，时态为一般现在时，主语是三单，谓语动词用三单。故填needs。 70．句意：世界上有一半的人没有喝足够的水。half of“一半”，固定短语。故填of。 71．ate 72．is 73．an 74．better 75．things 76．them 77．in 78．to learn 79．However 80．usually 【导语】本文介绍了遗忘是正常的，是学习的重要组成部分。 71．句意：你能记得一周前的午饭吃了什么吗？根据“a week ago”可知，该句时态为一般过去时，eat要变成过去式ate。故填ate。 72．句意：你可能会认为遗忘不是一件好事。根据“may”可知，该句时态为一般现在时，主语it是第三人称单数，be动词用is。故填is。 73．句意：科学家发现遗忘是学习的重要组成部分。important以元音音素开头，且是泛指，用不定冠词an。故填an。 74．句意：除去不必要的信息可以帮助我们的大脑比以前更好地工作。根据“than”可知，该处填入比较级，well的比较级是better。故填better。 75．句意：当环境总是在变化时，我们的大脑可能希望我们记住更少的东西。提示词“thing”是可数名词，fewer后跟可数名词复数形式。故填things。 76．句意：比如，一个超市收银员每天都会遇到很多人，可能只会记住他们很短的时间。remember是谓语动词，后跟宾格，they的宾格是them。故填them。 77．句意：在我们的大脑中有一个特殊的地方叫做海马体。根据句意，这个特殊的地方在大脑中，in our brains意为“在我们大脑中”。故填in。 78．句意：这对我们学习和记忆来说很重要。此处是固定句型：It is +adj. for sb. to do sth.意为“做某事对某人来说怎么样”。故填to learn。 79．句意：然而，如果你总是忘记事情，这并不总是好的。该段和前一段存在转折关系，前一段主要讲遗忘是正常的，该段主要讲总是忘记事情并不一定是好的。句首字母大写。故填However。 80．句意：当你没有足够的睡眠时，你通常很难记住新的信息。该处的词修饰动词“have”，用副词，usual的副词是usually，意为“通常”。故填usually。 答案第1页，共2页 答案第1页，共2页 学科网（北京）股份有限公司 $$