Unit 6 When was it invented ？ 单元话题语法填空专练(含答案+解析)-2025-2026学年九年级英语（人教版）

Unit 6 When was it invented
单元话题语法填空专练
学校:___________姓名：___________班级：___________考号：___________
一、短文填空
Fireworks were invented in China in the 7th century. A group of Taoists (道士) were trying to create a medicine that would make people live 1 (long) than before. Instead, they 2 (accidental) invented gunpowder (火药). From then on, it was always 3 (use) for fireworks.
Today, fireworks are used for celebrations in our daily life. From ancient China to the New World, fireworks have 4 (develop) a lot. The very first fireworks didn’t do much more than pop (爆炸), but modern ones have many 5 (style). And they can also create lots of shapes, many colors and different sounds. People shoot fireworks into the sky when they 6 (be) celebrating a great event. It fills the dark sky 7 bright reds, blues, yellows, greens and whites.
Often movies or television cartoons show fireworks to mark the excitement of any event or activity. One such event is 8 (fall) in love. If anything can produce fireworks, it is a sweetheart’s kiss 9 the touch of a lover’s hand.
Fireworks can also be 10 useful expression. For example, when one wants to stop a loud argument, he may say, “I want no more of these fireworks in this room.” Whether you are happy or angry, there are always fireworks.
阅读下面的短文，在空白处填入一个适当的词，或填入括号中所给词的适当形式。
We can see many inventions around us every day. Some of the inventions have already 11 （change）our life. Paper is a useful invention. There was no paper 12 people to use a few thousand years ago. A lot of 13 （invent）in China wanted to find a new way for people to make a thing that could 14 （write）on. It must be cheap and light enough. A kind of paper had already been invented at the beginning of Han Dynasty（汉朝）, 15 it was too thin and soft, so most authors liked to use the heavy bamboo.
At that time, there was a man 16 （call）Cai Lun. He was very familiar with the technique and then he made 17 new kind of paper which was based on that. This new kind of paper 18 （make）of wood, used cloth and something that was very cheap and quite easy 19 （get）. 20 a result, people now in the world are still using the paper which is made by the way that Cai Lun began to use.
Hold your hands together and you feel the heat from them. Did you know that this heat could be a kind of energy(能量)
Ann Makosinski, 21 15-year-old girl from British Columbia, Canada, made a flashlight (手电筒) that only uses the heat from your hands as energy. The 22 (invent) won top prize in the Google Science Fair’s 15-16 age group.
Makosinski has been 23 (interest) in human energy since Grade 6. She said as humans, we produce heat every minute. She wanted to make use of that 24 (light) up the flashlight. She found a kind of tile (瓦片). These tiles produce electricity when one side is heated and the other is 25 (cool).
She made the flashlight hollow (空心的) and put the tiles both inside and outside of it. 26 (hold) the flashlight with your hands would make the tiles heat up on one side. At the same time, the air cools the tiles on the inside of the flashlight.
The electricity made by the tiles was enough for an LED light, 27 it did not make enough voltage (电压). 28 voltage, flashlights will not light up. To deal with the problem, Makosinski spent months finding information on the Internet and 29 (do) lots of trials at home. She said sometimes she thought it would never work, but she knew “you just kind of have to keep going”.
In the end, she made a circuit (电路) by 30 (she) and it worked! Makosinski is working on getting a patent (专利) for her flashlight.
Like most other things, a book is the result of thousands of years of human invention.
First, the invention of writing came out 31 (probable) about 5, 500 years ago. With writing, people did not have to remember everything in their heads. They could communicate with people that they never 32 (see) and share their knowledge with future generations.
Later, the Greeks were well-known for their literature and science, 33 their "books" looked very different from the books of today. They were called scrolls(卷轴). They were difficult to use. About 2, 000 years ago, books with lots of 34 (page) were invented.
For more than 35 thousand years, the pages of books were made from animals' skin. That changed in the 36 (thirteen) century, when Europeans learned about a very useful Chinese invention-paper.
But the biggest change 37 books in Europe came in 1439, when Johannes Gutenberg invented the printing press. Before that, books in Europe were copied by hand, so they were very expensive. Many more people could a 38 the books that were produced on a printing press.
These days it is difficult to imagine a world without books. But human 39 / n ven n/ does not stop. Every year, more stories are bought as e-books and read on a screen.
On November 5th, 1872, the ship Mary Celeste left New York 40 Italy. The captain (船长), his wife and daughter and seven sailors(海员) were on this ship. But something terrible happened. The captain of another ship 41 (find) Mary Celeste floating (漂浮) in the middle of the sea on December 4th, 1872. 42 , nobody was on the ship.
43 were the captain, his family and the sailors Why did they leave the ship Mary Celeste was not 44 (break). Everything was good. It seemed that the captain, his family and the sailors had 45 (leave) the ship in a hurry. We could tell all these because there was half-eaten food on the table. The sailors also left all 46 (they) clothing behind. The lifeboat (救生艇) was still on the ship. The captain’s diary was found on the ship and the last passage 47 (write) on November 24th.
What happened 48 November 24th and December 4th. How and when did the people leave the ship So far, nobody can answer all these 49 (question). It is still a mystery.
A trader had traded in a far city for months and made a lot 50 money. He was riding his horse home. He rode on and on. The trader said to 51 (he), “I'll lock the money in my safe (保险箱), or I won't feel comfortable.”
At noon the trader stopped 52 (give) his horse water. “Sir, a nail (钉子) is loose (未固定牢的) in your horse's shoe,” somebody reminded him. The trader said, “I am in a hurry. I'll fix it when I get home.”
In the afternoon 53 (other) person reminded him to fix it, but he refused and the nail remained loose. The trader rode farther. When he went into a forest, the horse fell down all of 54 sudden and could not get up again.
The trader could only spend the night in the forest. 55 (lucky) he discovered a house nearby. And the old woman in the house agreed to let him stay.
The trader put his bag of money under his arm and soon fell into a 56 (deeply) sleep.
At midnight, a group of robbers (强盗) 57 (come) to the house. The old woman was their partner. The robbers stole the bag of money.
The next morning, when the trader woke up, he found his money 58 (steal), and there was nobody in the house.
Now the trader lost everything just 59 he would not stop to fix a small nail in his horse's shoe.
The first chocolate was enjoyed 60 the people in Central and South America hundreds of years ago. In those days, the cocoa bean(可可豆)was used to make chocolate drink. Much later, it 61 (bring) to Europe.
In 1824, Mr. Cadbury opened a small shop in the United Kingdom. He 62 (sell) chocolate drink.
In 1831, he opened a factory to make chocolate drink. Mr. Cadbury believed 63 wine was bad and he wanted 64 (encourage) people to drink chocolate instead. A few years later, a man invented a way to make chocolate bars(块), and so people had the chance to eat chocolate instead of only 65 (drink) it.
At first, only dark chocolate was made. Milk chocolate came later and it was made by adding milk 66 the chocolate. Mr. Cadbury made the first milk chocolate bar in 1897. The most famous chocolate, Cadbury's Milk Bar, was made in 1905. It 67 (be) popular for over 100 years. The Cadbury factory still 68 (make) chocolate in the United Kingdom, and the chocolate is eaten all over the world. Every year, thousands of visitors go to the factory to see 69 chocolate is made.
Many of humans’ great achievements are in science and technology. The list is almost endless. The 70 (invent) of the airplane has changed our lives. The discovery of antibiotics(抗生素) has saved the lives of millions of people. Can you imagine 71 (live) without electricity What about the printing press Without the printing press, you wouldn’t be reading this. In the last 50 years, there have been great achievements in 72 (communicate), such as radios, TVs, computers, the Internet and smartphones(智能手机). We could probably live without them, but life wouldn’t be as 73 (interest) as it is now.
What about the arts The arts have brought 74 (please) to many people, but are the Beatles and Bach more important than antibiotics And is Mickey Mouse as important an achievement as going to space 75 (final), we must not forget humans’ early achievements. They used fire for cooking and 76 (heat) and invented the wheel. We can’t imagine modern life without 77 (cook) food and cars.
What are humans’ greatest achievements To answer the question, we need 78 (decide) what we mean by “great”. Is it something that 79 (make) us rich or happy or save lives Or is it just something that makes us say “Wow” like the Great Wall What do you think
Many of humans' great achievements are in science and technology. The list is almost endless. The 26. 80 (invent) of the airplane has changed our lives. The discovery of antibiotics(抗生素) has saved the lives of millions of people. Can you imagine 27. 81 (live) without electricity What about the printing press Without the printing press, you wouldn't be reading this. In the last 50 years, there have been great achievements in 28. 82 (communicate), such as radios, TVs, computers, the Internet, and smartphones(智能手机). We could probably live without them, but life wouldn't be as 29. 83 (interest) as it is now.
What about the arts The arts have brought 30. 84 (please) to many people, but are the Beatles and Bach more important than antibiotics And is Mickey Mouse as important an achievement as going to space 31. 85 (final), we must not forget humans' early achievements. They used fire for cooking and 32. 86 (heat) and invented the wheel. We can't imagine modern life without 33. 87 (cook) food and cars.
What are humans' greatest achievements To answer the question, we need 34. 88 (decide) what we mean by “great”. Is it something that 35. 89 (make) us rich or happy or save lives Or is it just something that makes us say “Wow，” like the Great Wall What do you think
根据短文内容及首字母提示补全短文
In our everyday life, we can see inventions everywhere. It is so hard to imagine what life will be like w 90 these inventions, like cars, computers, televisions and zippers. Even the smallest inventions can make a big d 91 to our lives. The barcode(条形码)is one of the m 92 useful inventions. If you want to know the information of the goods, you can scan the barcode with your smartphone. But do you know how the barcode was i 93 ？Here is something about it.
In 1948, an owner of a small food store found i 94 difficult to record the inventory(详细目录)and prices of his goods. S 95 he turned to the Drexel Institute of Technology. He wanted to find a m 96 to solve the problem. The good news was that Bernard Silver took up the challenge and began w 97 on it. At last Bernard Silver and a group of students from the institute set up a barcode system to solve the problem. To p 98 the invention, Bernard and his classmate Woodland decided to get a patent(专利). It took them about three years. F 99 ，on October 7th, 1952, they got the patent. And the invention is more and more widely used in the world.
《Unit 6 When was it invented 单元话题语法填空专练（含答案 解析）-2025-2026学年九年级英语（人教版）》参考答案
1．longer 2．accidentally 3．used 4．developed 5．styles 6．are 7．with 8．falling 9．or 10．a
本文是一篇说明文。文章主要介绍了烟花的由来、特点等以及在不同场合的使用。
1．一群道士试图发明一种能让人们活得比之前更久的药。根据后文的than可知此处应该用形容词的比较级。故填longer。
2．取而代之的是他们意外地发明了火药。谓语动词invented应该用副词来修饰。故填accidentally。
3．从那之后，火药总是用于制作烟花。根据语境可知it(代指火药)和use之间是被动关系，be used for“被用于……”。故填used。
4．从古代中国到如今的新世界，烟花有了很多的发展。根据时间状语“From ancient China to the New World”和have可知，句子应该用现在完成时态have+done结构，develop的过去分词形式为developed。故填developed。
5．现代的烟花有许多样式。many后跟可数名词复数形式。故填styles。
6．当人们在庆祝大事件时，他们把烟花放向空中。根据“People shoot fireworks into the sky”可知主句为一般现在时，从句也用现在的某种时态，从句主语为they，所以be动词要用复数。故填are。
7．烟花用红色、蓝、黄色、绿色和白色的亮光洒满了黑暗的夜空。fill sth with sth“充满，装满”，固定短语。故填with。
8．其中一种这样的情景就是在相爱时。根据“One such event is”可知要用现在分词构成现在进行时。故填falling。
9．它是一个甜心的吻或者爱人的手的触摸。根据谓语动词is是单数可知后面只能是选择，不能为并列。故填or。
10．烟花也能成为一种有用的表达方式。此处缺少限定词，根据expression可知宾语为单数，且不特指，useful是辅音音素开头，用不定冠词a。故填a。
11．changed 12．for 13．inventors 14．be written 15．but 16．called 17．a 18．was made 19．to get 20．As
本文讲述纸的发明，汉朝时已经有了纸，但是它太薄太软，后来蔡伦更新造纸术，现在世界上人们仍然在使用蔡伦造纸的方法。
11．一些发明已经改变了我们的生活。根据空前“have already”可知，是现在完成时，空处用过去分词，change的过去分词为“changed”，故填changed。
12．几千年前还没有供人们使用的纸。根据“There was no paper”以及“for”可知，空处用介词，表示“对于人们”，for“对于，为了”，故填for。
13．中国的许多发明家都想找到一种新的方法，制造一种可以让人们在上面写字的东西。根据“wanted to find a new way”可知，用inventor“发明家”，且根据“A lot of”可知，用复数形式，故填inventors。
14．中国的许多发明家都想找到一种新的方法，制造一种可以让人们在上面写字的东西。关系代词that引导定语从句，代指先行词“thing”在从句中作主语，与从句谓语“write”之间是被动关系，情态动词“could”后用动词原形，write的过去分词形式为“written”，故填be written。
15．一种纸已经在汉代初期被发明出来了，但是它太薄太软，所以大多数的作者喜欢用沉重的竹子。根据“A kind of paper had already been invented at the beginning of Han Dynasty”以及“it was too thin and soft”可知，虽然在汉代初期已经有了纸张，但是它太薄太软，表示转折，用but，故填but。
16．在那时有一个叫蔡伦的人。call“叫作”，空处用过去分词作后置定语，故填called。
17．他非常熟悉这种工艺，在此基础上，他发明了一种新型的纸。根据句意可知，用a kind of“一种”，故填a。
18．这种新型的纸是用木头、用过的布和一些非常便宜、很容易得到的东西制成的。主语“this new kind of paper”与谓语“make”之间是被动关系，且根据“which was based on that”可知，用一般过去时的被动语态，故填was made。
19．这种新型的纸是用木头、用过的布和一些非常便宜、很容易得到的东西制成的。根据空前“quite easy”可知，用动词不定式作状语，故填to get。
20．结果，现在世界上的人们仍然在使用蔡伦一开始使用的方法造纸。根据“This new kind of paper was made of wood, used cloth and something that was very cheap and quite easy to get”可知，用as a result“结果”，开头字母要大写，故填As。
21．a 22．invention 23．interested 24．to light 25．cooled 26．Holding 27．but 28．Without 29．doing 30．herself
本文讲述了来自加拿大的15岁女孩制造了一种只用手的热量作为能量的手电筒。这项发明赢得了今年谷歌科学博览会15-16岁年龄组的最高奖。
21．一位来自加拿大不列颠哥伦比亚圣的15岁女孩安·马科辛斯基制造了一种只用手的热量作为能量的手电筒。根据“15-year-old girl”可知，15是辅音音素开头的单词，故空处填不定冠词a来表示泛指。故填a。
22．这项发明赢得了今年谷歌科学博览会15-16岁年龄组的最高奖。根据“made a flashlight that only uses the heat from your hands as energy.”可知，小女孩发明了一种手电筒，这个手电筒获得了最高奖，结合所给词提示，故空处填写invent的名词“invention”。故填invention。
23．马科辛斯基从六年级开始就对人体能量感兴趣。be interested in“对……感兴趣”，故空处填写interest的形容词“interested”。故填interested。
24．她想使用这些热量点亮手电筒。分析句子成分可知，空处缺少状语，故空处填写to light，作目的状语。故填to light。
25．当一边加热，另一边冷却时，这些瓷砖就会发电。根据“one side is heated”可知，一面被加热，故另一边被冷却，故空处用cool的过去分词“cooled”。故填cooled。
26．手里拿着手电筒将会使一端加热。根据后文“would make the tiles heat up on one side.”可知，空处填写动名词做主语，故空处填写hold的名词holding，句首首字母大写。故填Holding。
27．瓦片发的电对于LED灯来说是足够的，但是没有产生足够的电压。分析“The electricity made by the tiles was enough for an LED light”和“it did not make enough voltage”可知，前后两句表示转折，故空处填写but。故填but。
28．没有电压，手电筒将不会亮。根据后文“flashlights will not light up”可知，前文指的是没有电压，手电筒就不会亮。故填介词without，句首首字母大写，故填Without。
29．为了解决这个问题，马科辛斯基花费了数月从网上查找信息，并且在家里做实验。根据前文“spent months finding information”可知spend+时间+doing“花费时间做某事”，故空处填do的动名词形式“doing”。故填doing。
30．最后，她靠自己做成了一个电路，并且它成功了。do sth by oneself“靠某人自己做某事”，故空处填herself。故填herself。
31．probably 32．saw 33．but 34．pages 35．a 36．thirteenth 37．for 38．afford 39．invention
本文介绍了书籍的发展史。
31．首先，书写的发明大约出现在5500年前。此空修饰动词“came out”，要用副词，故填probably。
32．他们可以与他们从未见过的人交流，并与后代分享他们的知识。以前从未见过的，句子用一般过去时，动词用过去式，故填saw。
33．后来，希腊人以他们的文学和科学而闻名，但他们的“书”看起来与今天的书有很大的不同。“ the Greeks were well-known for their literature and science”与“their "books" looked very different from the books of today”是转折关系，故填but。
34．大约2000年前，人们发明了很多页的书。page“页”，可数名词，lots of修饰可数名词的复数形式，故填pages。
35．一千多年来，书的书页都是用动物的皮做成的。此处表示“一千年”，英文表达是a thousand years，故填a。
36．这种情况在13世纪发生了变化。在某个世纪，用in+序数词+century，故填thirteenth。
37．但欧洲书籍最大的变化发生在1439年。根据“But the biggest change…books in Europe came in 1439”可知，此处表示“关于书籍最大的变化”，用介词for表示“关于”，故填for。
38．更多的人能够买得起印刷出来的书。根据“Many more people could … the books”可知，此处表示“买得起，支付得起”，英文表达为afford，情态动词后接动词原形，故填afford。
39．但是人类发明没有停止。根据音标，invention“发明”，根据“does not”可知，此空应填单数名词，故填invention。
40．for 41．found 42．However 43．Where 44．broken 45．left 46．their 47．was written 48．between 49．questions
短文主要讲述了神秘的玛丽 · 塞莱斯特号的故事。
40．1872年11月5日，玛丽 · 塞莱斯特号离开纽约前往意大利。固定用法：leave......for“离开.......到某地”，符合语境，故填for。
41．1872年12月4日，另一艘船的船长发现玛丽 · 塞莱斯特漂浮在海中。find找到，动词。这里缺少的是谓语部分，根据“on December 4th, 1872.”可知应该用一般过去时，故填found。
42．然而，船上没有人。根据“But something terrible happened. The captain of another ship ......Mary Celeste floating (漂浮) in the middle of the sea on December 4th, 1872.”和“nobody was on the ship. ”可知前后关系是转折，又有逗号隔开，however“然而”符合语境，故填However。
43．船长，他的家人和水手在哪里？根据“nobody was on the ship.”和“Why did they leave the ship ”，可知这里是问船上的人去哪里了，where“哪里”符合语境，故填Where。
44．玛丽 塞莱斯特并没有坏。break打破，动词。be动词后接形容词作表语，break的形容词为broken“损坏了的”，符合语境，故填broken。
45．看起来船长，他的家人和水手们匆忙离开了船。leave离开，动词。这里缺少的是位于部分，并且表示的是过去的过去的动作，应该用过去完成时（had done），故填left。
46．水手们也留下了他们所有的衣服。they他们，代词。clothing衣服，名词。形容词性物主代词修饰名词，故填their。
47．船长的日记是在船上找到的，最后一段写于11月24日。write写，动词。观察句子，这里缺少的是谓语部分，根据“on November 24th”可知应该用一般过去时。并且这里主语为“the last passage”，主谓之间应该是被动关系为“最后一段被写”，可知用一般过去时的被动语态，故填was written。
48．11月24日到12月4日之间发生了什么。固定用法：between......and......“在......和......之间”，符合语境，故填between。
49．到目前为止，没有人能回答所有这些问题。question问题，可数名词单数。根据该空前“all these”，可知应该用其复数形式，故填questions。
50．of 51．himself 52．to give 53．another 54．a 55．Luckily 56．deep 57．came 58．was stolen 59．because
本文是一个小故事。讲述了一个商人赚了很多钱。他骑马回家。他的马蹄上的钉子松了，他认为浪费时间，他不愿意停下来修理。当他走进森林时，那匹马突然摔倒了，再也爬不起来了。商人只能在森林里过夜。午夜时分，来了一群强盗，强盗偷走了他的钱。现在这个商人失去了一切，只因为他不肯停下来把一个小钉子钉在马蹄上。
50．一个商人在一个遥远的城市做了几个月的买卖，赚了很多钱。短语a lot of意思为“许多”，修饰不可数名词和可数名词复数。故填of。
51．商人自言自语道：“我把钱锁在保险箱里，否则我就不舒服了。”短语say to oneself意思为“对自己说，自言自语”。he的反身代词是himself；故填himself。
52．中午，商人停下来给马一些水喝。短语“stop to do sth.”意思为“停下来（去）做某事”，“stop doing sth.”意思为“不要做某事，停止做某事”。根据下文““Sir, a nail (钉子) is loose (未固定牢的) in your horse's shoe,” somebody reminded him.”可知使用短语“stop to do sth.”。故填to give。
53．下午，另一个人提醒他去修，但他拒绝了，钉子还是松了。根据第2段“At noon ... somebody reminded him.”可知“下午，另一个人提醒他去修”。another意思为“另一个，又一个”，修饰可数名词单数。故填another。
54．当他走进森林时，那匹马突然摔倒了，再也爬不起来了。短语“all of a sudden”意思为“突然”。故填a。
55．幸运的是他在附近发现了一所房子。空格处修饰整个句子，可知填副词形式；句子的开头首字母要大写；lucky意思为“幸运的”，形容词，其副词形式luckily；故填Luckily。
56．商人把一袋钱夹在腋下，很快就睡着了。空格处修饰名词sleep，可知填形容词；deeply意思为“深深地”，副词，其形容词为“deep”。故填deep。
57．午夜时分，一群强盗来到了这所房子。本文讲述了已经发生的故事，时态主要是一般过去时，可知此句时态为一般过去时。come的过去式为came；故填came。
58．第二天早上，当商人醒来时，他发现他的钱被偷了，家里没有人。本句是宾语从句，根据句意可知宾语从句语态为被动语态，主句是一般过去时可知宾语从句时态为一般过去时，可知此句是一般过去时的被动语态，其构成“was/were done”。宾语从句主语his money是第三人称单数，可知be动词使用was；steal意思为“偷”，过去分词为“stolen”。故填was stolen。
59．现在这个商人失去了一切，只因为他不肯停下来把一个小钉子钉在马蹄上。根据句意可知，后句是前句的原因，后句是原因状语从句，故填because。
60．by 61．was brought 62．sold 63．that 64．to encourage 65．drinking 66．to 67．has been 68．makes 69．how
本文介绍了巧克力的历史。
60．第一块巧克力是几百年前中美洲和南美洲的人们享用的。本句是一般过去时的被动语态，其结构为“was/were done by+动作的执行者”。故填by。
61．很久以后，它被带到欧洲。本句也是讲述过去发生的事情，根据句意可知主语和谓语动词是被动关系，此句时态是一般过去时的被动语态，其结构为“was/were done by+动作的执行者”。主语it是第三人称单数，可知be动词使用was；bring的过去分词是brought，故填was brought。
62．他卖巧克力饮料。根据上文“In 1824，Mr. Cadbury opened a small shop in the United Kingdom.”可知描述1824年的事情，时态是一般过去时，sell的过去式为sold。故填sold。
63．吉百利认为葡萄酒不好，他想鼓励人们喝巧克力。空格处后面“wine was bad”是陈述句，作动词believed的宾语，可知使用that引导此宾语从句；故填that。
64．吉百利认为葡萄酒不好，他想鼓励人们喝巧克力。短语want to do sth.意思为“想做某事”，want后面跟动词不定式作宾语。故填to encourage。
65．几年后，一个人发明了一种制作巧克力棒的方法，因此人们有机会吃巧克力而不是只喝巧克力。空格前instead of意思为“代替，而不是”，介词短语，可知填动名词作宾语。故填drinking。
66．牛奶巧克力后来出现了，它是在巧克力中加入牛奶制成的。短语add sth. to sth.意思为“把某物加入某物里”。故填to。
67．它已经流行了100多年了。根据“for over 100 years”可知此句时态是现在完成时，其结构为“has/have done”，主语it第三人称单数，可知使用has，be的过去分词是been，故填has been。
68．吉百利工厂仍在英国生产巧克力，全世界都在吃巧克力。本句是and连接的并列句，and后面的句子“the chocolate is eaten all over the world.”是一般现在时，可知此句使用一般现在时。本句主语“The Cadbury factory”第三人称单数，可知谓语动词使用三单形式；故填makes。
69．每年，成千上万的游客到工厂参观巧克力是如何制作的。根据“thousands of visitors go to the factory to see”可知成千上万的游客到工厂的目的是看巧克力是如何制作的。故填how。
70．invention 71．living 72．communication 73．interesting 74．pleasure 75．Finally 76．heating 77．cooked 78．to decide 79．makes
文章大意：本文主要讲了自古以来，人类在科学、技术、艺术等各方面的伟大发明对我们生活上的改变。离开了这些发明，我们无法想象我们的生活会是什么样子。
70．飞机的发明改变了我们的生活。
分析句子结构，这里是在句子中做主语的，所以要用invent的名词形式，故填invention。
71．你能想象没有电的日子吗？
这里考查imagine的用法，想象做某事imagine doing sth, 故填living。
72．在过去的50年里，在通讯方面有很多重大发明，比如收音机、电视机、电脑、网络和智能手机。
communicate是动词，因为in是介词，后面需要跟名词作宾语，故填communication。
73．或许离开了它们我们也可以生活，但是生活不会像现在一样有趣。
前面有be动词，并且有as … as, 所以要用形容词的原级，故填interesting。
74．艺术给很多人带来了快乐。
这里是做brought的宾语，所以用please的名词形式，故填pleasure。
75．最后，我们一定不要忘记人类早期的发明。
观察句子结构，这里是做状语的，所以要用副词形式，故填Finally。
76．他们过去使用火来做饭和加热，并且发明了轮子。
and连接两个并列的成分，前后的词形式和时态要保持一致，and前是cooking，所以后面也用动名词形式，故填heating。
77．我们无法想象没有熟食和车的现代生活会是什么样子的。
without是介词后跟名词，这里表示“做熟了的食物”，因为食物是被做的，所以用过去分词做形容词用，表示被动关系，故填cooked。
78．为了回答这个问题，我们需要确定我们所说的“伟大”指的是什么。need to do sth 固定搭配，意思是“需要做某事”，故填to decide。
79．它是使我们富有、高兴或挽救我们生命的东西吗？
分析句子结构可知这里是that引导的定语从句，且that在从句中做主语，先行词something是复合不定代词，所以make要变成makes。故填makes。
用单词填空时，在理解文章意思的同时，不仅要看其前后的词，而且要理解整个句子表达的意思，还要注意所填的词在句中的词性、时态等等。然后根据句意、上下文联系、语境及所给出的单词提示填写合适的词语。例如第8小题，如果只是看到了without就判断介词后跟名词、代词、动名词的话，那就错了，通过理解句意可知，这里并不表示做食物，而是表示做熟了的食物，是一个名词短语，故填cooked，而不能填cooking。
80．invention 81．living 82．communication　 83．interesting 84．pleasure 85．Finally 86．heating 87．cooked 88．to decide　 89．makes
本文主要讲了自古以来，人类在科学，技术，艺术等各方面的伟大发明对我们生活上的改变。离开了这些发明，我们无法想象我们的生活会是什么样子。
80．飞机的发明改变了我们的生活。分析句子结构，这里是在句子中做主语的，所以要用invent的名词形式，故填invention。
81．你能想象没有电的日子吗？这里考察imagine的用法，想象做某事imagine doing sth, 故填living。
82．在过去的50年里，在通讯方面有很多重大发明，比如收音机，电脑，网络，智能手机。communicate是动词，因为in 是介词，后面需要跟名词作宾语，故填communication。
83．或许离开了他们我们也可以生活，但是生活不会像现在一样有趣。前面有be动词，并且有as…as, 所以要用形容词的原级，故填interesting。
84．艺术给很多人带来了快乐。这里是做brought的宾语，所以用please 的名词形式，故填pleasure。
85．最后，我们一定不要忘记人类早期的发明。观察句子结构，这里是做状语的，所以要用副词形式，故填Finally。
86．他们过去使用火来做饭和加热，并且发明了轮子。and前后的词形式和时态要保持一致，and前是cooking，所以后面也用动名词形式，故填heating。
87．我们无法想象没有熟食和车的现代生活会是什么样子的。without 是介词后跟名词，这里表示“做熟了的食物” 因为食物是被做的，所以用过去分词做形容词用，表示被动关系，故填cooked。
88．人类最大的成就是什么呢？为了回答这个问题，我们需要确定我们所说的“伟大”指的是什么。need to do sth 需要做某事，故填to decide。
89．它是使我们富有，高兴，或挽救我们生命的东西吗呢？从句子结构分析这里是that引导的定语从句，且that 在从句中做主语，先行词是something是复合不定代词，所以make 要变成makes。
用单词填空时，在理解文章意思的同时，不仅要看其前后的词，而且要理解整个句子表达的意思，例如第8小题，如果只是看到了without就判断介词后跟名词,代词，动名词的话，那就错了，通过理解句意可知，这里并不表示做食物，而是表示做熟了的食物，是一个名词短语，故填cooked, 而不能填cooking。
90．without 91．difference 92．most 93．invented 94．it 95．So 96．method 97．working 98．protect 99．Finally
短文大意：本文主要讲述了条形码技术发展的历史及经过，作者给我们提供了一些相关方面的信息。
90．很难想象没有这些发明，像汽车、电脑、电视和拉链，生活会是什么样的。without介词，没有，表示条件。故填：without。
91．即使是最小的发明也能给我们的生活带来巨大的影响。difference名词，不同；固定短语make a big difference产生很大影响。故填：difference。
92．条形码是最有用的发明之一。useful 形容词，有用的；形容词useful的最高级the most useful。故填：most。
93．但是你知道条形码是怎么发明的吗？invent动词，发明；invented过去式或过去分词；根据句意可知，本句是被动语态：be+动词的过去分词。故填：invented。
94．1948年，一个小食品店老板发现很难记录库存和他的商品的价格。it人称代词，在本句中作形容宾语。本句是固定句型：find it+形容词+to do sth. 意为“发现做某事是怎么样的”。故填：it。
95．于是他求助于德雷克斯理工学院。so连词，所以；那么，表示结果。故填：So。
96．他想找到一种方法来解决这个问题。method名词，方法、方式。a method一种方法。故填：method。
97．好消息是Bernard Silver接受了挑战，并开始着手工作。work动词，工作；固定短语 work on从事于。begin doing开始做某事。故填：working。
98．为了保护发明，Bernard和他的同学Woodland决定申请专利。protect动词，保护；to protect the invention动词不定式表目的。故填：protect。
99．最后，在1952年10月7日，他们获得了专利。finally副词，最后, 表示事件发展的顺序。故填：Finally。
：整体把握语篇大意，揣摩上下文文意，选择最符合作者表达意图的选项；牢记常见的短语、固定句型“find it+形容词+to do sth.”，把握其各自含义和用法。