【话题分析】
本单元主题属于“人与社会”范畴，话题为“发明”。该话题的写作内容主要包括某项发明的历史、特点、用途、在社会发展中所发挥的作用等。该话题写作常用到被动语态。通过对发明的了解，培养创新精神。
【佳句积累】
1. 它真是一个很棒的发明！It's really !
2. 它也可以用来锻炼。
It can also exercise.
3. 在所有现代发明中，我认为轮子是最重要的一项。
Among , I think the wheel is .
4. 它是几千年前发明的，当时是用木头做的。
a few thousand years ago and it wood at that time.
5. 多亏了这些惊人的发明和伟大的发明家，我们的生活得到了极大的改善。
these amazing inventions and the great inventors, our lives have been .
6. 更重要的是，它帮助我们开阔眼界去看外面的世界。
What's more, it helps us to see the outside world.
7. 毫无疑问，手机在我们的日常生活中发挥着重要的作用。
There is no doubt that the mobile phone our daily lives.

1. such a great invention
2. be used for
3. all the modern inventions; the most important one
4. It was invented; was made of
5. Thanks to; greatly improved
6. open our eyes
7. plays an important part/role in

【分析】
解题时需结合句子语境、语法规则（如被动语态、形容词最高级）及本单元固定短语填空：1题需用such修饰名词短语的结构；2题考查“被用来做某事”的固定搭配；3题需用all表范围，三者以上用最高级；4题考查一般过去时的被动语态及“由……制成（看得出原材料）”的表达；5题考查“多亏”的短语及现在完成时被动；6题考查“开阔眼界”的固定搭配；7题考查“在……发挥重要作用”的固定短语，同时注意主谓一致。
【解析】
1. 空格后为可数名词单数invention，需用“such + a/an + adj + 可数名词单数”结构，故填such a great invention。
2. 考查固定搭配be used for doing sth（被用来做某事），情态动词can后用be动词原形，故填be used for。
3. “所有现代发明”译为all the modern inventions；三者以上比较用形容词最高级，important的最高级为the most important，用one指代前文的wheel，故填all the modern inventions; the most important one。
4. 主语it指代wheel，与invent是被动关系，时间为a few thousand years ago，用一般过去时被动（was + 过去分词），故填It was invented；“由木头制成（看得出原材料）”用be made of，过去式为was made of，故填was made of。
5. “多亏”译为固定短语Thanks to；“生活被极大改善”是现在完成时被动（have been + 过去分词），improve的过去分词为improved，用副词greatly修饰，故填Thanks to; greatly improved。
6. 考查固定搭配help sb do sth，“开阔眼界”译为open our eyes，故填open our eyes。
7. 考查固定短语play an important part/role in（在……中发挥重要作用），主语the mobile phone是单数，一般现在时谓语用第三人称单数plays，故填plays an important part/role in。
【答案】
1. such a great invention
2. be used for
3. all the modern inventions; the most important one
4. It was invented; was made of
5. Thanks to; greatly improved
6. open our eyes
7. plays an important part/role in
【知识点】
固定搭配、被动语态、形容词最高级
【点评】
本题围绕“发明”话题，考查本单元核心的英语固定表达与语法知识，是单元基础巩固练习，需结合语境和语法规则准确填写，有助于掌握话题相关常用表达。
【难度系数】
0.5

【写作任务】
从古至今,无数的发明改变了我们的生活,使我们的生活水平不断提高。在这诸多的发明中,你认为哪一项发明是最有用的? 假设你是李明,请你给你校交换生 Peter 写一封邮件,和他分享你心中最有用的一项发明。要点如下:
(1)点明你认为最有用的发明是什么;
(2)介绍这项发明;
(3)谈谈你对这项发明的评价。
注意:(1)不得在作文中出现真实校名和考生的真实姓名。
(2)语句连贯,词数 80 左右。作文开头和结尾已经给出,不计入总词数。
审题思路
1.体裁:应用文 2.人称:第三人称 3.时态:一般过去时、一般现在时
谋篇布局

习作演练
Dear Peter,
How are you doing? I'm writing to talk about the most useful invention in my opinion






Hope you can share your favourite invention with me soon.
Yours,
Li Ming

One possible version:
Dear Peter,
How are you doing? I'm writing to talk about the most useful invention in my opinion. Of all the inventions, I think the computer is the most useful.
The computer was invented in 1946. It is used for doing many things. People can go online to search for the information they need. People can send emails to each other instead of writing letters. Sending emails is much more convenient and faster than writing letters. People can also use computers to do many other things, such as listening to music and shopping. Nowadays, computers are widely used in banks, schools, companies, hospitals and many other places. Computers are also used in scientific research field today.
The computer is so useful that it is becoming one of the most important parts of people's lives.
Hope you can share your favourite invention with me soon.
Yours,
Li Ming

【分析】
首先明确写作体裁是给交换生的邮件，人称以第一、第三人称为主，时态结合一般过去时（介绍发明时间）和一般现在时（说明用途、评价）。需按照思维导图结构完成：开篇点题点明最有用的发明，具体介绍该发明的时间和多种用途，最后总结评价其重要性，确保要点齐全、语句连贯，词数符合要求。
【解析】
1. 开篇点题：承接给定开头，用“Of all the inventions, I think the computer is the most useful.”点明最有用的发明是电脑；
2. 具体介绍：说明电脑发明于1946年，列举其用途（上网查信息、发邮件、听音乐、购物等），体现其广泛应用；
3. 总结评价：用“The computer is so useful that it is becoming one of the most important parts of people's lives.”总结电脑的重要性，完成邮件写作。
【答案】
One possible version:
Dear Peter,
How are you doing? I'm writing to talk about the most useful invention in my opinion. Of all the inventions, I think the computer is the most useful.
The computer was invented in 1946. It is used for doing many things. People can go online to search for the information they need. People can send emails to each other instead of writing letters. Sending emails is much more convenient and faster than writing letters. People can also use computers to do many other things, such as listening to music and shopping. Nowadays, computers are widely used in banks, schools, companies, hospitals and many other places. Computers are also used in scientific research field today.
The computer is so useful that it is becoming one of the most important parts of people's lives.
Hope you can share your favourite invention with me soon.
Yours,
Li Ming
【知识点】
英语应用文写作；发明相关英语表达；时态运用
【点评】
该作文符合邮件格式，结构清晰，严格按照思维导图要点展开，内容完整，语言连贯，准确运用对应时态，符合初中英语写作要求。
【难度系数】
0.6