Unit 4 Inventions单元知识总结及重点易错专项训练2026-2027学年沪教版英语八年级上册

**基本信息** 聚焦单元核心语法与词汇，以“知识梳理+分层训练+易错点睛”构建系统性突破体系，助力语言能力与思维品质提升。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |10个重点易错考点|每考点9题（基础/提升/拓展各3题）|“易错点睛”提炼核心技巧（如被动语态使用条件、固定搭配介词规则等）|按语法功能（被动语态→固定搭配）与逻辑递进（基础→拓展）构建知识链，衔接主题词汇与语法应用|

沪教版八年级上册 Unit 4 Inventions 单元知识总结及重点易错专项训练 ■ ■ ■ ■ ■ ■ ■ 说明：本练习紧扣最新教材精选 10 个重点易错考点，每个考点含基础题×3、提升题×3、拓展题×3，共 90 题。 第一部分　单元重点知识梳理 一、重点单词（按主题分类） 主题类别 核心单词 发明与创造 invention 发明（物）；inventor 发明者；invent 发明；discover 发现；develop 研制；create 创造；technique 技巧 交通与器具 wheel 轮；telephone 电话；light bulb 电灯泡；mobile phone 手机；balloon 气球；candle 蜡烛；lamp 灯；train 火车；car 汽车；3D printer 3D打印机；steam locomotive 蒸汽机车；crewed spacecraft 载人航天器 物质与材料 metal 金属；mixture 混合物；petrol 汽油；wing 机翼；type 类型 动作与状态 attach 固定；pull 拉；depend 依靠；avoid 避免；notice 注意到；heat 加热；press 压；change 改变；allow 允许；imagine 想象；lead 导致 评价与属性 comfortable 舒适的；practical 实用的；central 中心的；international 国际的；important 重要的；popular 受欢迎的；special 特殊的 其他名词 doubt 疑惑；prediction 预言；statement 说明；benefit 益处；distance 距离；century 世纪；passenger 乘客；traffic jam 交通阻塞；international trade 国际贸易 二、重点短语（按功能分类） 功能类别 重点短语 被动结构 be invented by 由……发明；be used for 被用来做（接名词/动名词）；be used to do 被用来做（接动词原形）；be made of 由……制成（看出原料）；be made from 由……制成（看不出原料）；be made in 在……制造 数量与程度 a number of 若干；the number of ……的数量；large amounts of 大量的（接不可数）；all over the world 全世界；of all time 有史以来 动作与搭配 depend on 依靠；attach...to... 把……固定在……上；make fun of 取笑；keep in touch with 保持联系；lead to 导致；make a difference 发挥作用；come up with 想出；try out 试验；work on 从事 时间与因果 since then 自那以来；from then on 从那时起；as a result 结果；at the same time 同时；in the daytime 在白天 举例与搜寻 for instance 例如；in search of 寻找；without doubt 毫无疑问；on foot 步行；take place 发生 三、重点句型 功能 例句 询问发明时间 — When was the telephone invented? — It was invented in 1876. 询问发明者 — Who was it invented by? — It was invented by Alexander Graham Bell. 询问用途 — What is it used for? — It is used for communication. 描述影响 The invention of the airplane changed the world greatly. / Computers have made our lives much easier. not only…but also Not only the wheel but also the telephone has changed the world. although 让步 Although the old lamp was weak, people could read at night. 四、重点语法（彩色卡片） 语法项目 结构 / 要点 一般过去时被动 was / were + 过去分词（主语是动作承受者，强调过去被做） 一般现在时被动 am / is / are + 过去分词（经常性、习惯性被动状态） be made of / from / in of 看出原料；from 看不出原料；in 接产地 be used for / to do for 后接名词/动名词；to 后接动词原形，均表"被用来做" not only…but also 就近原则：谓语动词与靠近 but also 的主语一致 a number of / the number of a number of + 复数（谓语复数）；the number of + 复数（谓语单数） large amounts of 后接不可数名词，谓语用复数 although 引导让步状语从句，不与 but 连用 depend on / attach…to… / make fun of 均为固定搭配，介词（on / to / of）不可省略 invent / discover invent 发明新事物；discover 发现已存在事物 第二部分　重点易错考点专项训练 考点一：一般过去时的被动语态（was / were + 过去分词） 【易错点睛】易错点睛：主语是动作的承受者时用被动语态；be 动词随主语单复数选 was / were；过去分词拼写勿错；不及物动词（如 happen, take place）无被动。 基础题：（选择题） ◇（ ）1. The first practical telephone ___ by Alexander Graham Bell in 1876. A. was invented B. invented C. is invented D. invents ◇（ ）2. The light bulb ___ by Thomas Edison in 1879. A. develops B. was developed C. develop D. is developed ◇（ ）3. The Kongming Lantern ___ to give signals in battles long ago. A. is used B. uses C. was used D. used 提升题：（选择题） ▶（ ）1. The wheel ___ thousands of years ago, and it changed transport. A. invented B. is invented C. has invented D. was invented ▶（ ）2. A new type of 3D printer ___ by Chen Wei's team last month. A. was developed B. develops C. is developed D. develop ▶（ ）3. The hot-air balloon ___ from the Kongming Lantern many years later. A. created B. was created C. creates D. is created 拓展题：（选择题） ★（ ）1. The crewed spacecraft ___ in Qingdao and sent into space in 2023. A. builds B. is built C. was built D. has built ★（ ）2. The steam locomotive ___ by Olivia's grandfather in the old factory. A. repaired B. is repaired C. repairs D. was repaired ★（ ）3. The special mixture ___ onto the metal by the workers yesterday. A. was pressed B. pressed C. is pressed D. presses 考点二：一般现在时的被动语态（am / is / are + 过去分词） 【易错点睛】易错点睛：表示现在经常性、习惯性的被动状态或客观事实；be 动词随主语单复数变化（is / are）；被动句中 by 短语常可省略。 基础题：（选择题） ◇（ ）1. English ___ widely in international trade. A. is used B. was used C. uses D. used ◇（ ）2. The wheel ___ perhaps the greatest invention in history. A. calls B. is called C. was called D. called ◇（ ）3. Mobile phones ___ all over the world every day. A. were used B. use C. are used D. used 提升题：（选择题） ▶（ ）1. The 3D printer ___ to make small models in our school lab. A. was used B. uses C. used D. is used ▶（ ）2. Petrol ___ as fuel for many cars in Wuhan, says Zhou Kai. A. is used B. was used C. uses D. used ▶（ ）3. The ballpoint pen ___ by millions of people every day. A. uses B. is used C. used D. was used 拓展题：（选择题） ★（ ）1. The benefit of this new technique ___ by Bella's team. A. was studied B. studies C. is studied D. studied ★（ ）2. Large amounts of metal ___ to build the central bridge in Xiamen. A. is used B. were used C. uses D. are used ★（ ）3. The prediction about future traffic ___ seriously by experts. A. is taken B. was taken C. takes D. took 考点三：be made of / be made from / be made in 辨析 【易错点睛】易错点睛：be made of 能看出原材料（物理变化）；be made from 看不出原材料（化学变化）；be made in 后接产地；be made by 后接制造者。 基础题：（选择题） ◇（ ）1. The table ___ wood. You can see the wood clearly. A. is made of B. is made from C. is made in D. is made by ◇（ ）2. Paper ___ wood, but you cannot see the wood in it. A. is made of B. is made from C. is made in D. is made by ◇（ ）3. The mobile phone ___ China is very popular. A. is made of B. is made from C. is made in D. is made by 提升题：（选择题） ▶（ ）1. The candle ___ wax, and the wax comes from plants. A. is made from B. is made in C. is made by D. is made of ▶（ ）2. The mixture ___ several metals, so we cannot tell one from another. A. is made of B. is made from C. is made in D. is made by ▶（ ）3. The crewed spacecraft ___ in Qingdao was a great success. A. is made of B. is made in C. is made from D. is made by 拓展题：（选择题） ★（ ）1. The balloon ___ a special kind of light metal, so it can fly high. A. is made from B. is made in C. is made of D. is made by ★（ ）2. The paper for the Kongming Lantern ___ bamboo and is very thin. A. is made of B. is made in C. is made of D. is made from ★（ ）3. This new type of wing ___ Kunming is used on small drones. A. is made in B. is made of C. is made from D. is made by 考点四：be used for 与 be used to do 辨析 【易错点睛】易错点睛：be used for 后接名词或动名词（doing）；be used to do 中 to 为不定式符号，后接动词原形；二者都表"被用来做"。 基础题：（选择题） ◇（ ）1. The telephone ___ communication between people. A. is used for B. is used to C. used for D. used to ◇（ ）2. The light bulb ___ see at night. A. is used for B. is used to C. used for D. used to ◇（ ）3. The wheel ___ move things easily. A. is used for B. used to C. is used to D. used for 提升题：（选择题） ▶（ ）1. The 3D printer ___ making small models in art class. A. is used to B. used for C. used to D. is used for ▶（ ）2. Mobile phones ___ keep in touch with friends anytime. A. are used to B. are used for C. used to D. used for ▶（ ）3. The special technique ___ improve the speed of the train. A. is used for B. is used to C. used for D. used to 拓展题：（选择题） ★（ ）1. The mixture ___ fixing the broken wing of the model plane. A. is used to B. used for C. is used for D. used to ★（ ）2. Large amounts of petrol ___ power the central heating system. A. are used for B. used to C. used for D. are used to ★（ ）3. The new prediction method ___ help drivers avoid traffic jams. A. is used to B. is used for C. used to D. used for 考点五：not only … but also 就近原则 【易错点睛】易错点睛：not only … but also 连接两个主语时，谓语动词与靠近 but also 的主语（即后者）在人称和数上保持一致。 基础题：（选择题） ◇（ ）1. Not only Olivia but also her brothers ___ interested in inventions. A. are B. is C. am D. be ◇（ ）2. Not only the wheel but also the telephone ___ changed the world. A. have B. has C. are D. were ◇（ ）3. Not only Chen Wei but also Bella ___ a new idea for the 3D printer. A. have B. are C. has D. were 提升题：（选择题） ▶（ ）1. Not only the students but also the teacher ___ the ballpoint pen every day. A. use B. are using C. used D. uses ▶（ ）2. Not only Xiamen but also other cities ___ the crewed spacecraft. A. develop B. develops C. is developing D. was developing ▶（ ）3. Not only the candle but also the lamp ___ light at night. A. give B. gives C. are giving D. gave 拓展题：（选择题） ★（ ）1. Not only the mixture but also the metal ___ heated by the machine. A. are B. were C. is D. be ★（ ）2. Not only Zhou Kai but also They ___ in search of a better technique. A. is B. am C. be D. are ★（ ）3. Not only the prediction but also the statements ___ true at last. A. are B. is C. was D. be 考点六：a number of / the number of / large amounts of 辨析 【易错点睛】易错点睛：a number of + 复数名词（谓语用复数）；the number of + 复数名词，意为"……的数量"（谓语用单数）；large amounts of + 不可数名词（谓语用复数）。 基础题：（选择题） ◇（ ）1. A number of students ___ the invention show in Jinan. A. visit B. visits C. is visiting D. was visiting ◇（ ）2. The number of the mobile phones ___ growing fast. A. are B. is C. were D. be ◇（ ）3. Large amounts of petrol ___ needed for the train. A. is B. was C. are D. be 提升题：（选择题） ▶（ ）1. A number of new techniques ___ tried out by Lily's team. A. is B. was C. be D. are ▶（ ）2. The number of traffic jams in Wuhan ___ falling this year. A. are B. is C. were D. be ▶（ ）3. Large amounts of metal ___ used to build the bridge in Xiamen. A. is B. are C. was D. be 拓展题：（选择题） ★（ ）1. A number of crewed spacecraft ___ developed in Qingdao since 2020. A. has B. was C. have D. is ★（ ）2. The number of balloons at the festival ___ over one thousand. A. are B. were C. be D. is ★（ ）3. Large amounts of mixture ___ pressed onto the path by the machine. A. are B. is C. was D. be 考点七：although 不与 but 连用 【易错点睛】易错点睛：although 意为"虽然"，引导让步状语从句，句中不可再用 but（"虽然……但是……"只需其一）；though 同理。 基础题：（选择题） ◇（ ）1. ___ the telephone is small, it is very useful. A. Although B. But C. Although but D. So ◇（ ）2. ___ Olivia is young, she has many good ideas about inventions. A. But B. Although C. And D. So ◇（ ）3. ___ the old lamp was weak, people could read at night. A. But B. So C. Although D. Because 提升题：（选择题） ▶（ ）1. ___ the mixture looks strange, it is useful for the wing. A. But B. And C. Although but D. Although ▶（ ）2. ___ Chen Wei was tired, he kept working on the 3D printer. A. So B. Although C. But D. Because ▶（ ）3. ___ the traffic jam was heavy, Bella arrived on time. A. And B. Although C. But D. So 拓展题：（选择题） ★（ ）1. ___ the prediction was wrong, the team did not give up. A. But B. So C. Although D. And ★（ ）2. ___ the metal is light, it is strong enough for the spacecraft. A. But B. Because C. So D. Although ★（ ）3. ___ They lived far from the lab, they came up with a great idea. A. But B. Although C. So D. And 考点八：depend on / attach … to … / make fun of 固定搭配 【易错点睛】易错点睛：depend on（依靠）、attach … to …（把……固定在……上）、make fun of（取笑）均为固定搭配，介词 on / to / of 不可省略或替换。 基础题：（选择题） ◇（ ）1. We should ___ our own effort, not just luck. A. depend on B. depend C. depend in D. depend at ◇（ ）2. Please ___ the small balloon ___ the model plane's wing. A. attach; in B. attach; to C. attach; on D. attach; at ◇（ ）3. It is not kind to ___ others' ideas. A. make fun B. make fun at C. make fun of D. make fun on 提升题：（选择题） ▶（ ）1. The benefit of the new technique ___ its easy use. A. depends in B. depends at C. depends D. depends on ▶（ ）2. Jam attached a tiny light ___ the top of the Kongming Lantern. A. to B. in C. on D. at ▶（ ）3. Some students ___ Zhang Hao because of his strange invention. A. made fun B. made fun of C. made fun at D. made fun on 拓展题：（选择题） ★（ ）1. The speed of the train ___ the type of petrol it uses. A. depends in B. depends at C. depends on D. depends ★（ ）2. Olivia attached a special statement ___ the metal mixture yesterday. A. to B. in C. on D. at ★（ ）3. We should not ___ the prediction just because it sounds odd. A. make fun of B. make fun C. make fun at D. make fun on 考点九：in search of / as a result / for instance / without doubt 等介词短语 【易错点睛】易错点睛：in search of 寻找；as a result 结果（表因果）；for instance 例如（举例子）；without doubt 毫无疑问。注意短语整体使用，不可漏词。 基础题：（选择题） ◇（ ）1. The team went to Kunming ___ a better technique. A. in search of B. in search C. search of D. search for ◇（ ）2. He practised every day; ___, he won the invention prize. A. For instance B. As a result C. Without doubt D. In search of ◇（ ）3. Many cities, ___ Wuhan, use 3D printers in schools. A. As a result B. Without doubt C. For instance D. In search of 提升题：（选择题） ▶（ ）1. ___, the light bulb is one of the greatest inventions of all time. A. As a result B. For instance C. In search of D. Without doubt ▶（ ）2. They travelled to Xiamen ___ a rare type of metal. A. In search of B. As a result C. For instance D. Without doubt ▶（ ）3. The balloon rose; ___, people could see it from far away. A. For instance B. As a result C. Without doubt D. In search of 拓展题：（选择题） ★（ ）1. ___, mobile phones have changed our daily life greatly. A. As a Result B. For instance C. Without doubt D. In search of ★（ ）2. Chen Wei went to Jinan ___ the central part for the machine. A. As a result B. For instance C. Without doubt D. In search of ★（ ）3. The new wing works well; ___, the plane flies faster. A. As a result B. For instance C. Without doubt D. In search of 考点十：invent / discover 辨析与名词派生（invention / inventor） 【易错点睛】易错点睛：invent 指"发明"以前不存在的新事物；discover 指"发现"客观上已存在但此前未知的事物。invent → invention（发明物）/ inventor（发明者）。 基础题：（选择题） ◇（ ）1. Alexander Graham Bell ___ the telephone in 1876. A. invented B. discovered C. found D. looked ◇（ ）2. Columbus ___ America, which was already there. A. invented B. discovered C. created D. made ◇（ ）3. The ___ of the light bulb changed the world. A. invent B. inventor C. invention D. inventing 提升题：（选择题） ▶（ ）1. Laszlo Biro was the ___ of the ballpoint pen. A. invent B. invention C. inventing D. inventor ▶（ ）2. Scientists ___ a new kind of metal under the ground in Qingdao. A. discovered B. invented C. created D. made ▶（ ）3. The ___ of the wheel is perhaps the greatest in history. A. invent B. invention C. inventor D. inventing 拓展题：（选择题） ★（ ）1. Zhou Kai ___ a smart robot that can avoid traffic jams. A. discovered B. found C. invented D. looked ★（ ）2. The ___ of the crewed spacecraft is a young engineer from Wuhan. A. invent B. invention C. inventing D. inventor ★（ ）3. We ___ a small path behind the school that nobody knew. A. discovered B. invented C. created D. made 第三部分　参考答案与详细解析 【考点一：一般过去时的被动语态（was / were + 过去分词）】 基础题 1. 答案：A。解析：电话在1876年被贝尔发明，主语是动作承受者，用一般过去时被动 was invented；invented 为动词原形不能作谓语，is invented 为现在时不符。 2. 答案：B。解析：灯泡被爱迪生研制，过去被动 was developed，主语单数用 was；develops 主动现在时，is developed 时态错。 3. 答案：C。解析：孔明灯过去被用来发信号，用一般过去时被动 was used；is used 现在时，uses 主动，used 缺 be 动词。 提升题 1. 答案：D。解析：轮子数千年前被发明，过去被动 was invented；invented 主动，is invented 现在时，has invented 主动完成均错。 2. 答案：A。解析：新型3D打印机上月被研制，过去被动 was developed，主语单数；develops 主动，is developed 现在时，develop 原形错。 3. 答案：B。解析：热气球由孔明灯被创造，过去被动 was created；created 主动，creates 主动，is created 现在时错。 拓展题 1. 答案：C。解析：载人航天器2023年在青岛被建造，过去被动 was built；builds 主动，is built 现在时，has built 主动完成错。 2. 答案：D。解析：蒸汽机车被 Olivia 的祖父修理，过去被动 was repaired；repaired 缺 be，is repaired 现在时，repairs 主动错。 3. 答案：A。解析：混合物昨天被工人压在金属上，过去被动 was pressed；pressed 缺 be，is pressed 现在时，presses 主动错。 【考点二：一般现在时的被动语态（am / is / are + 过去分词）】 基础题 1. 答案：A。解析：英语在国际贸易中被广泛使用，一般现在时被动 is used；was used 过去时，uses 主动，used 缺 be。 2. 答案：B。解析：轮子或许被称为史上最伟大的发明，一般现在时被动 is called；calls 主动，was called 过去时，called 缺 be。 3. 答案：C。解析：手机每天在全世界被使用，一般现在时被动 are used（主语复数）；were used 过去时，use 主动，used 缺 be。 提升题 1. 答案：D。解析：3D打印机被用于制作模型，一般现在时被动 is used；was used 过去时，uses 主动，used 缺 be。 2. 答案：A。解析：汽油在武汉被用作许多汽车的燃料，一般现在时被动 is used；was used 过去时，uses 主动，used 缺 be。 3. 答案：B。解析：圆珠笔每天被数百万人使用，一般现在时被动 is used；uses 主动，used 缺 be，was used 过去时。 拓展题 1. 答案：C。解析：这项新技术的益处被 Bella 的团队研究，一般现在时被动 is studied；was studied 过去时，studies 主动，studied 缺 be。 2. 答案：D。解析：大量金属被用来建造厦门的中心桥，一般现在时被动 are used（large amounts of + 不可数，谓语复数）；is used 单数，were used 过去时，uses 主动。 3. 答案：A。解析：关于未来交通的预测被专家认真对待，一般现在时被动 is taken；was taken 过去时，takes 主动，took 主动过去。 【考点三：be made of / be made from / be made in 辨析】 基础题 1. 答案：A。解析：桌子由木头制成且能看出原料，用 be made of；from 看不出原料，in 接产地，by 接制造者。 2. 答案：B。解析：纸由木头制成但看不出原料，用 be made from；of 看出原料，in 产地，by 制造者。 3. 答案：C。解析：中国制造手机很受欢迎，be made in + 产地；of / from 表原料，by 接制造者。 提升题 1. 答案：D。解析：蜡烛由蜡制成且能看出，be made of；from 看不出，in 产地，by 制造者。 2. 答案：A。解析：混合物由几种金属制成看不出，be made from；of 看出原料，in 产地，by 制造者。 3. 答案：B。解析：在青岛制造的载人航天器很成功，be made in + 产地；of / from 原料，by 制造者。 拓展题 1. 答案：C。解析：气球由一种轻金属制成能看出，be made of；from 看不出，in 产地，by 制造者。 2. 答案：D。解析：孔明灯用的纸由竹子制成且很薄，看不出原料 be made from；of 看出，in 产地，by 制造者。 3. 答案：A。解析：昆明制造的这种机翼用于小型无人机，be made in + 产地；of / from 原料，by 制造者。 【考点四：be used for 与 be used to do 辨析】 基础题 1. 答案：A。解析：电话被用来（做）人际交流，communication 为名词，用 be used for；to 后接动词原形，used for / used to 形式错。 2. 答案：B。解析：灯泡被用来在夜间照明，see 为动词，用 be used to do；for 后接名词/动名词，used for / used to 错。 3. 答案：C。解析：轮子被用来轻松移动物品，move 动词，be used to do；A / D 语序错。 提升题 1. 答案：D。解析：3D打印机被用于美术课制作小模型，making 动名词，be used for；to 后接原形，used for / used to 错。 2. 答案：A。解析：手机被用来随时与朋友保持联系，keep 动词，are used to do；for 后接名词，used to / used for 错。 3. 答案：B。解析：这项特殊技术被用来提高火车速度，improve 动词，be used to do；for 后接名词，used for / used to 错。 拓展题 1. 答案：C。解析：混合物被用来修理模型飞机破损的机翼，fixing 动名词，be used for；to 后接原形，used to / used for 错。 2. 答案：D。解析：大量汽油被用来为中央供暖系统供能，power 动词，are used to do；for 后接名词，used to / used for 错。 3. 答案：A。解析：这种新预测方法被用来帮助司机避开拥堵，help 动词，be used to do；for 后接名词，used to / used for 错。 【考点五：not only … but also 就近原则】 基础题 1. 答案：A。解析：就近原则，靠近谓语的主语是 her brothers（复数），用 are；is 单数，am 只配 I，be 原形错。 2. 答案：B。解析：就近原则，靠近谓语的是 the telephone（单数），用 has；have 复数，are / were 为 be 动词错。 3. 答案：C。解析：靠近谓语的是 Bella（单数），用 has；have 复数，are / were 错。 提升题 1. 答案：D。解析：靠近谓语的是 the teacher（单数），用 uses；use 复数，are using 进行，used 过去均错。 2. 答案：A。解析：靠近谓语的是 other cities（复数），用 develop；develops 单数，is developing 进行，was developing 过去进行错。 3. 答案：B。解析：靠近谓语的是 the lamp（单数），用 gives；give 复数，are giving 进行，gave 过去错。 拓展题 1. 答案：C。解析：靠近谓语的是 the metal（单数），用 is；are / were 复数，be 原形错。 2. 答案：D。解析：靠近谓语的是 They（复数），用 are；is 单数，am 配 I，be 原形错。 3. 答案：A。解析：靠近谓语的是 the statements（复数），用 are；is 单数，was 过去，be 原形错。 【考点六：a number of / the number of / large amounts of 辨析】 基础题 1. 答案：A。解析：a number of + 复数名词，谓语用复数 visit；visits 单数，is / was visiting 时态错。 2. 答案：B。解析：the number of + 复数名词，意为"……的数量"，谓语用单数 is；are 复数，were 过去，be 原形错。 3. 答案：C。解析：large amounts of + 不可数名词，谓语用复数 are；is / was 单数，be 原形错。 提升题 1. 答案：D。解析：a number of techniques 谓语复数，且被动 are tried out；is / was 单数，be 原形错。 2. 答案：A。解析：the number of traffic jams 谓语单数 is；are 复数，were 过去，be 原形错。 3. 答案：B。解析：large amounts of metal 谓语复数 are；is / was 单数，be 原形错。 拓展题 1. 答案：C。解析：a number of spacecraft（复数）谓语复数 have（现在完成）；has 单数，was 过去，is 错。 2. 答案：D。解析：the number of balloons 谓语单数 is；are 复数，were 过去，be 原形错。 3. 答案：A。解析：large amounts of mixture 谓语复数 are；is / was 单数，be 原形错。 【考点七：although 不与 but 连用】 基础题 1. 答案：A。解析：although 引导让步状语从句，不与 but 连用，单独用 Although；But 不能与本从句同用，Although but 重复，So 表结果错。 2. 答案：B。解析：although 意为"虽然"，引导让步状语从句，不与 but 连用；But 不能用于此，And / So 逻辑错。 3. 答案：C。解析：Although the old lamp was weak 表让步，单独用 although；But 重复，So 表结果，Because 表原因错。 提升题 1. 答案：D。解析：although 引导让步，不与 but 连用；But 重复，And 并列，Although but 重复错。 2. 答案：B。解析：although Chen Wei was tired 表让步；So 表结果，But 重复，Because 表原因错。 3. 答案：B。解析：although the traffic jam was heavy 表让步；And / But / So 均不符合让步逻辑。 拓展题 1. 答案：C。解析：although the prediction was wrong 表让步；But 重复，So / And 逻辑错。 2. 答案：D。解析：although the metal is light 表让步；But 重复，Because / So 逻辑错。 3. 答案：B。解析：although They lived far 表让步；But 重复，So / And 逻辑错。 【考点八：depend on / attach … to … / make fun of 固定搭配】 基础题 1. 答案：A。解析：depend on 意为"依靠"，为固定搭配，on 不可省；depend 单独、depend in / at 均错。 2. 答案：B。解析：attach … to … 意为"把……固定在……上"，to 为固定介词；in / on / at 搭配错。 3. 答案：C。解析：make fun of 意为"取笑"，of 不可省；make fun 单独、at / on 搭配错。 提升题 1. 答案：D。解析：depend on 固定搭配"依靠"，on 不可省；in / at 介词错，depend 缺 on 错。 2. 答案：A。解析：attach … to … 固定搭配，to 不可换；in / on / at 错。 3. 答案：B。解析：make fun of 固定搭配"取笑"，of 不可省；make fun 单独、at / on 错。 拓展题 1. 答案：C。解析：depend on "依靠"，on 不可省；in / at 介词错，depend 缺 on 错。 2. 答案：A。解析：attach … to … 固定搭配"把声明附在金属混合物上"，to 不可换；in / on / at 错。 3. 答案：A。解析：make fun of "取笑"，of 不可省；make fun 单独、at / on 错。 【考点九：in search of / as a result / for instance / without doubt 等介词短语】 基础题 1. 答案：A。解析：in search of 意为"寻找"，为固定短语；in search 少 of，search of 缺 in，search for 非本单元搭配。 2. 答案：B。解析：as a result 意为"结果"，表因果承接；for instance 例如，without doubt 无疑，in search of 寻找，均不符。 3. 答案：C。解析：for instance 意为"例如"，引出例子 Wuhan；as a result 结果，without doubt 无疑，in search of 寻找错。 提升题 1. 答案：D。解析：without doubt 意为"毫无疑问"，符合语境；as a result 结果，for instance 例如，in search of 寻找错。 2. 答案：A。解析：in search of "寻找"稀有金属，符合；as a result 结果，for instance 例如，without doubt 无疑错。 3. 答案：B。解析：as a result "结果"气球升起所以远处可见，表因果；for instance 例如，without doubt 无疑，in search of 寻找错。 拓展题 1. 答案：C。解析：without doubt "毫无疑问"手机极大改变生活；as a result 结果，for instance 例如，in search of 寻找错。 2. 答案：D。解析：in search of "寻找"机器中心部件，符合；as a result 结果，for instance 例如，without doubt 无疑错。 3. 答案：A。解析：as a result "结果"新机翼好使所以飞更快，表因果；for instance 例如，without doubt 无疑，in search of 寻找错。 【考点十：invent / discover 辨析与名词派生（invention / inventor）】 基础题 1. 答案：A。解析：invent 意为"发明"以前不存在的事物（电话）；discover 发现已存在，find 找到，look 看错。 2. 答案：B。解析：discover 意为"发现"已存在但未知的事物（美洲）；invent 发明，create 创造，make 制作错。 3. 答案：C。解析：invention 为名词"发明物"，作主语；invent 动词，inventor 发明者，inventing 动名词错。 提升题 1. 答案：D。解析：inventor 为名词"发明者"，Laszlo Biro 是圆珠笔发明者；invent 动词，invention 发明物，inventing 错。 2. 答案：A。解析：discover "发现"地下已有金属；invent 发明，create 创造，make 制作错。 3. 答案：B。解析：invention "发明物"，轮的发明；invent 动词，inventor 发明者，inventing 错。 拓展题 1. 答案：C。解析：invent "发明"新事物（智能机器人）；discover 发现已有，find 找到，look 看错。 2. 答案：D。解析：inventor "发明者"，航天器发明者是工程师；invent 动词，invention 发明物，inventing 错。 3. 答案：A。解析：discover "发现"学校后无人知晓的小路；invent 发明，create 创造，make 制作错。 学科网（北京）股份有限公司 $