人教版高二英语必修5Unit 5 First aid 单元测试题 2(附答案解析)

文档属性

名称 人教版高二英语必修5Unit 5 First aid 单元测试题 2(附答案解析)
格式 doc
文件大小 190.5KB
资源类型 教案
版本资源 人教版(新课程标准)
科目 英语
更新时间 2020-08-04 10:29:23

图片预览

文档简介

Unit 5 First aid
第二部分:阅读理解(共两节,满分40分)
第一节(共15小题;每小题2分,满分30分)
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
A
Hi Singapore First Aid Training Center!
I am Nivashini Kaliaperumal, a research officer working at the Institute of Molecular and Cellular Biology (IMCB). Under the coaching of both you and Mr Jason Sim, I was certified (证明) to be a first aider yesterday.
Coincidentally (恰巧), my first aid skills were put to test today. While returning to work with my workmates after lunch, we noticed a small crowd gathered around a 4D shop. Surprisingly, they weren’t buying lottery (彩票) tickets. Instead a pale looking aunty seated on the step of the shop had attracted a crowd around her. We immediately rushed to the scene.
I introduced myself as a certified first aider, which put her mind at rest. Though feeling weak, she refused to lie down. I realized that she was in a poorly ventilated (空气流通不好的) area as many were frequently walking past her. My workmates and I moved her to a well ventilated area. Some kind onlookers bought her mineral water. She felt better after resting and drinking some water.
A bleeding wound was noticed on her neck. She had been injured during her fall and was feeling weak. Thankfully a medical shop was nearby and necessary first aid items were bought. While dressing the wound, I collected necessary information (name, health problems, medicine, etc) about her. She is a patient with high blood pressure who takes her medicine regularly. A complete head to toe examination was performed. No further sign of bleeding was observed. We encouraged her to see a doctor before she left for home.
Being trained with proper first aid knowledge and skills allowed me to help Aunty Sally today. Thank you for taking the time to teach us these lifesaving skills. It has given me confidence to reach out to those in need and provide proper care. Special thanks to the First Aid Team for making a difference in our lives.
Best wishes,
Nivashini
21. After a brief examination of the aunty, the author _____.
A. bought her some food and drinks
B. moved her to a well ventilated area
C. kept talking to her to keep her awake
D. asked her to lie down and have a rest
22. Noticing that the aunty had a bleeding wound, the author _____.
A. dressed the wound at once
B. asked her to see a doctor immediately
C. directly rushed her to a nearby hospital
D. called her family to collect useful information
23. What抯 the author抯 intention of writing this text?
A. To express her thanks.
B. To describe an accident.
C. To share her knowledge about first aid.
D. To call on readers to learn first aid skills.
B
Maria Montessori (1870-1952) is a famous Italian educationalist whose method of teaching has influenced people all over the world.
Born in Italy in 1870, Montessori became the first female (女性的) doctor in her country after she graduated from medical school in 1896. Later, working with deprived (缺乏足够教育的) children, she set up a “Children’s House” in Rome. This was the place where she developed the Montessori Method, an educational system that encourages an informal style of teaching. Children learn from dealing with everyday materials and they develop at their own pace. The Montessori philosophy is simple. Children are individuals (个体) who must be free to learn without being criticized (批评) or limited. It抯 the child that controls the pace, topic and lessons, not the rest of the class or the teacher. As a result, children enjoy learning and this gives them confidence and makes them happy.
The Montessori Method also teaches children skills to help them become independent. Very young children learn to dress themselves, to cook and to put their toys and clothes away. Children are encouraged to repeat activities as often as they wish, and they develop their observation skills by doing different activities.
A Montessori teacher observes children closely in order to provide them with individual learning programmes. The teacher is a guide, not a leader of the classroom, helping to open students eyes to the wonders around them.
Montessori wanted to free children抯 minds so that they could learn through self-teaching and self-correction. It抯 an approach to teaching which encourages children to learn by doing and experimenting.
A typical room in a Montessori school has many things children can use, for example, books, objects and games. The furniture is light so they can arrange it as they wish, and the cabinets (橱柜) are low, so the children can reach them. Because the environment offers a range of activities, children like to work together and they develop a social life based on cooperation rather than competition.
Maria Montessori travelled all over the world, training teachers to use her method. She wrote The Montessori Method in 1912 and The Secret of Childhood in 1936.
24. What is TRUE about the Montessori Method?
A. It gives children freedom to learn.
B. It supports a formal way of teaching.
C. It has strict rules and instructions for children.
D. It encourages children to learn without teachers.
25. From the Montessori Method, children may learn _____.
A. some independent living skills
B. how to design different activities
C. mainly by observing their teachers
D. how to win in various competitions
26. Montessori aimed to _____.
A. free teachers from teaching
B. help reduce children抯 learning stress
C. help children develop international views
D. encourage children to learn by themselves
27. A typical room in a Montessori school is helpful in _____.
A. developing children抯 hobbies
B. exciting children抯 imagination
C. teaching children to cooperate
D. developing children’s sense of competition
C
The documentary (纪录片) Blood Lions shows South Africa’s cruel “canned” lion hunting industry. In canned hunts, lions are raised by humans and kept in enclosed (围住的) spaces on private hunting areas. Hunters can get trophy (战利品) heads easily in exchange for (交换) fees of up to $50,000. There are about 8,000 “ranch (a very large farm)” lions in South Africa. So the country’s hunt operators can make a fortune.
Ian Michler was a lead character in the film. He talked about Blood Lions last July when it was shown in Durban, South Africa. The film has since been viewed in 185 countries. More than 50 screenings have been held at film festivals and in meetings of special interest groups. This year, Blood Lions will be shown at every major tourism conference in Europe and Africa.
Outside the film, Michler and the team are running a global campaign. They are aimed at ending canned hunts and other cold-blooded activities involving lions and other large animals.
Australia became the first country, in February 2015, to forbid imports (进口) of lion trophies. It was followed by France in November. That month, Blood Lions was shown in the European Parliament. As a result, the governments of Finland, Italy, and Spain decided to hold their own screenings. There are a number of other countries likely to do the same.
At the same time, at the end of last year, the world抯 leading group of African lion researchers offered an important suggestion. They advised that any analysis of the present state of wild lions in South Africa should not include its thousands of 搑anch lions. Wild lions in South Africa now number some 3,000. There are around 20,000 wild lions in Africa.
揟he great majority of lion populations in Africa have been reduced, says Hans Bauer, lion researcher at Oxford University抯 Wildlife Conservation Research Unit. 揑t抯 important to stress that South Africa抯 ranch lions are a horror that has nothing to do with lion protection. These lions should never be taken into account in any serious analysis of the state of lions in Africa.
28. What do we learn about Blood Lions?
A. It has attracted many tourists.
B. It tells the story of a lion fighter.
C. It has an international influence.
D. It has brought the producer lots of money.
29. Michler and his team抯 campaign _____.
A. was first started in Australia
B. has won little support in Europe
C. has achieved noticeable effects
D. aims to save endangered animals
30. What can we infer about Bauer?
A. He suggests analyzing lions properly.
B. He has seen an increase of African wild lions.
C. He may be a strong supporter of trophy hunting.
D. He hopes that there will be more ranch lions in Africa.
31. What is the main purpose of the text?
A. To explain the main idea of a new film.
B. To report an animal protection campaign.
C. To encourage farmers to raise ranch lions.
D. To advertise South Africa’s hunting industry.
D
If someone asked you to quantify (衡量) the time you spend online, how would you answer? If you’re like one-fifth of Americans, you抎 likely say 揳lmost constantly. New research shows that 21 percent of Americans report that they抮e online more or less constantly.
Andrew Perrin, a research assistant at Pew, did a survey about Internet use. During the survey, adults were asked how much they go online. 13 percent said they don抰 go online and 13 percent said they go online several times a week or less. Only 10 percent said they go online once a day and much larger quantities said they go online several times a day (42 percent) or “almost constantly” (21 percent).
Interestingly, there wasn’t a gender split (性别分化) when it came to near constant Internet use. Age seems to be the great divider: Only six percent of people over 65 said they were online that much. Those who reported that they were online all the time included 12 percent of 50- to 64-year-olds, 28 percent of 30- to 49-year-olds and 36 percent of 18- to 29-year-olds.
Don抰 suppose that teenagers are online more than adults, however. In another survey, Pew found that while they did have a slight edge on adults in general when it came to 揳lmost constant Internet use, 24 percent said they were online pretty much all the time. They still fell greatly behind the 36 percent of adults between 18 and 29 years of age who were always online.
Given that the United Nations considers unrestricted (无限制的) Internet access (接入) to be a human right, the number of Americans who report being online “almost constantly” could rise along with availability and affordability. But it remains to be seen whether being online all the time is actually something to long for, or how constant connectivity will affect American culture in the long term.
32. What is Paragraph 2 mainly about?
A. The aim of the survey.
B. The results of the survey.
C. Why the survey mattered.
D. How the survey was carried out.
33. According to the text, most 揳lmost constant Internet users are _____.
A. teenagers
B. men over 50 years old
C. adults between 18 and 29 years old
D. women between 30 and 49 years old
34. The underlined part 揾ave a slight edge on in Paragraph 4 is closest in meaning to _____.
A. have power over
B. have an advantage over
C. have a very bad effect on
D. have nothing in common with
35. The author showed his concern about _____.
A. the affordability of Internet use
B. the availability of unrestricted Internet access
C. the effect constant Internet use may have on culture
D. the health problems constant Internet use may cause
第二节(共5小题;每小题2分,满分10分)
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Book and bookmaking
A book is a printed work that is meant to communicate. It’s made up of pages that are usually enclosed in a protective cover. 36 Among the countless types of books are novels, picture books, cookbooks, how-to books, poetry books, and textbooks.
The first step in creating a book is for an author to write a manuscript (手稿). Then the author finds a publisher, or a company that makes and sells books. 37 They make sure that the ideas are complete, that the writing is clear, and that there are no mistakes.
Then the manuscript goes to a designer. This person arranges the text and pictures on the pages so that the book looks nice and is easy to read. 38
Editors and designers continue working on the pages until they are perfect. The designed book is stored in computer files (文件).
Next, the computer files are used to create printing plates, which are pieces of metal or plastic that have the book’s text and pictures on them. Printing plates are put on printing presses and used to print the book.
Early books were difficult to produce. The text was written by hand. As a result, books were expensive and hard for most people to get. 39
The invention of printing changed that. In about 1450, a special type of printing press was invented in Germany. It could print many books quickly.
Today books are published in every language. Personal computers have allowed people to publish their own books. Many books can be read or downloaded from the Internet. 40
A. A designer also creates the cover.
B. Books can have either a hard cover or a soft cover.
C. This has made books easier to get than ever before.
D. People have written books about all kinds of subjects.
E. Only wealthy and powerful people read these early books.
F. Books became available to ordinary people for the first time.
G. Editors at the publishing company help the author improve the manuscript.
第三部分:英语知识运用(共两节,满分45分)
第一节:完形填空(共20小题;每小题1.5分,满分30分)
阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。
As a boy I was always small for my age. I was five years younger than one of my brothers and seven years younger than the other. 41 , I often felt left out when their friends came over to 42 . I was too 43 for whatever they were doing and they didn抰 want me to listen to their conversations either. More often than not I found myself outside playing 44 and feeling forgotten.
I remember one Spring afternoon I felt especially 45 as I sat in the yard behind our house. We lived miles from town and I 46 saw my own friends outside of school. I 47 my brothers laughing from 48 the house and felt a single tear coming down my face. At that moment I saw a large brown dog 49 me. He was wagging (摇摆) his tail 50 . He greeted me like a long lost 51 , licking (舔) my hand and sitting beside me on the grass, 52 he didn’t know me. I petted and 53 this four-legged angel (天使). He let me pour out all my troubles and 54 my deepest thoughts before he kissed me goodbye. I went back inside feeling happy, 55 that no matter what life might hold I was loved. I 56 that the dog was sent in that moment of 57 to remind me just how much I was loved.
In truth, nothing brings us greater 58 than knowing we are loved. Knowing we are loved gives us the 59 to love others as well. It also helps us to be the people the world meant for us to be. Remember how much the world loves you and share your 60 with the world.
41. A. For example B. As a result C. In fact D. At the beginning
42. A. discuss B. fight C. play D. work
43. A. young B. quick C. nervous D. noisy
44. A. excitedly B. alone C. secretly D. hard
45. A. relaxed B. anxious C. strange D. lonely
46. A. regularly B. even C. hardly D. always
47. A. heard B. found C. made D. imagined
48. A. behind B. over C. outside D. inside
49. A. walking to B. barking at C. passing by D. keeping off
50. A. quietly B. happily C. slightly D. naturally
51. A. child B. friend C. toy D. chance
52. A. because B. if only C. when D. even though
53. A. picked up B. thought of C. learned from D. talked to
54. A. form B. record C. share D. have
55. A. doubting B. wondering C. showing D. knowing
56. A. decide B. prove C. believe D. explain
57. A. sadness B. peace C. madness D. silence
58. A. changes B. honor C. ideas D. joy
59. A. pride B. freedom C. strength D. possibility
60. A. appreciation B. love C. faith D. growth
第Ⅱ卷
第三部分:英语知识运用(共两节,满分45分)
第二节(共10小题;每小题1.5分,满分15分)
阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
Just an hour after completing her first aid course, Mamta 61. ________ (wait) at a bus stop when she heard a crash and saw a motorcyclist flying through the air — his helmet was going one way and his motorbike the 62. ________. She could also see a pedestrian (行人) was knocked down.
As other pedestrians stood 63. ________ (shock) by the scene, Mamta 64. ________ (immediate) stepped forward and help. The motorcyclist’s eyes were rolling back; his head and arm 65. ________ (injure), and he was making noises. So she shouted at him, 揅an you breathe? While he was given emergency 66. ________ (treat), the confused motorcyclist actually tried to walk away but Mamta insisted he wait for the ambulance. Once the motorcyclist was comfortable, Mamta went over 67. ________ (check) on the injured pedestrian and pressed her blouse on his 68. ________ (bleed) arm. Before long, official medical help arrived.
Looking back on the incident, Mamta said, “I’d been asking tons of questions all through that day’s course. Little 69. ________ I know that I’d be putting it into practice on my way home. It just shows that even the most basic training can make 70. ________ difference.”
第四部分:写作(共两节,满分35分)
第一节:短文改错(共10小题;每小题1分,满分10分)
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线,并在该词下面写出修改后的词。
注意:1. 每处错误及其修改均仅限一词;2. 只允许修改10处,多者(从第11处起)不计分。
Last Friday, we went to Beijing Survival Island to go on an outing, that left us with a deep impression.
Early in the morning, we gathered the school gate and the school bus takes us there. In the way, we talked and laughed, full of excitement. Upon arrive, we were attracted by various activities and got involved immediate. The monkey bars were really challenging. One of the boys managed to make it with the encouragement of her classmates. I was interested in making cakes. I was being taught to make my first cake on my own! At lunchtime, we sat around, enjoying the delicious food. Everyone had the good time.
We really enjoyed our stay there. Before we left, we had a photo taken to record the unforgettable days.
第二节:书面表达(满分25分)
假如你校英文报正在开展主题为“急救常识”的征文活动。请你用英语写一篇短文,介绍一下自己所了解的急救知识,参加此次活动。注意:词数100左右。
参考答案:
21-25 BAAAA 26-30 DCCCA
31-35 BBCBC 36-40 DGAEC 41-45 BCABD
46-50 CADAB 51-55 BDDCD 56-60 CADCB
61. was waiting 62. other 63. shocked
64. immediately 65. were injured 66. treatment
67. to check 68. bleeding 69. did
70. a
短文改错:
71. ... that left us ... that → which
72. ... gathered the school gate ... gathered后加at
73. ... the school bus takes ... takes → took
74. In the way ... In → On
75. Upon arrive ... arrive → arrival / arriving
76. ... got involved immediate. immediate → immediately
77. ... her classmates. her → his
78. I was being taught ... 去掉being
79. ... had the good time. the → a
80. ... unforgettable days. days → day
One possible version:
If you are bitten by a dog, you should give first aid by following these steps.
If the bite only breaks the skin, treat it as a minor wound. Wash the wound thoroughly with soap and water. Apply an antibiotic cream to prevent infection and cover the bite with a clean bandage. If you notice signs of infection, such as swelling or redness, see a doctor immediately.
If the skin is badly torn and bleeding heavily, apply pressure with a clean, dry cloth to stop the bleeding and then go to a doctor as soon as possible.
部分解析
阅读理解:
第一节:
A篇 (人际关系)
本文是应用文。作者写信感谢急救培训中心教给她急救知识和技能,让她能在一次事故中帮助受伤的阿姨。
21. B。细节理解题。由第三段中的I realized that she was in a poorly ventilated area as many were frequently walking past her. My workmates and I moved her to a well ventilated area可知,作者和同事把伤者转移到空气流通好的地方。
22. A。细节理解题。由倒数第二段中的Thankfully a medical shop was nearby and necessary first aid items were bought. While dressing the wound ...可知,作者在发现伤者的伤口后,去附近的药店买了急救所需物品,并为伤者包扎了伤口。
23. A。写作目的题。由最后一段中的Thank you for taking the time to teach us these lifesaving skills和Special thanks to the First Aid Team for making a difference in our lives可知,作者写这封信是为了感谢新加坡急救培训中心教给她急救技能。
B篇 (个人情况)
本文是记叙文。文章主要介绍了意大利女性教育家玛丽亚·蒙特梭利及其独创的蒙特梭利教育法。
24. A。细节理解题。由第二段中的Children learn from dealing with everyday materials and they develop at their own pace ... children enjoy learning and this gives them confidence and makes them happy可知,蒙特梭利教育法认为儿童是独立的个体,它主张让儿童自由、自主地发展。
25. A。细节理解题。由第三段中的The Montessori Method also teaches children skills to help them become independent. Very young children learn to dress themselves, to cook and to put their toys and clothes away可知,蒙特梭利教育法教儿童一些帮助他们独立的技能。
26. D。推理判断题。由倒数第三段中的learn through self-teaching and self-correction和learn by doing and experimenting可知,Montessori想解放儿童的思想,让他们能够通过自我学习和自我改正而学习,鼓励儿童在实验和实践中学习。
27. C。推理判断题。由倒数第二段中的Because the environment offers a range of activities, children like to work together and they develop a social life based on cooperation rather than competition可知,蒙特梭利学校典型的教室会给儿童提供一个有一系列活动的环境,儿童喜欢一起完成任务,这样他们会建立一个基于合作而不是竞争的社交生活。
C篇 (自然)
本文是说明文。 《血狮》是一部揭露狮子困猎产业的纪录片,在全世界产生了重要影响。
28. C。细节理解题。由第二段中的The film has since been viewed in 185 countries. More than 50 screenings have been held at film festivals and in meetings of special interest groups可知,《血狮》是具有国际影响力的纪录片。
29. C。推理判断题。由第四段可知,Michler和他的团队的运动取得了令人瞩目的效果。
30. A。推理判断题。由最后两段的描述可知,Bauer提议用正确的方法分析非洲狮。
31. B。写作目的题。通读全文可知,本文主要报道了一项保护非洲狮等动物的国际运动。
D篇 (社会)
本文是议论文。美国一项调查表明,21%的人经常上网。这是否会对美国文化有影响呢?
32. B。段落大意题。由第二段中列举的数据可知,本段主要说明了这项调查的结果。
33. C。细节理解题。由第三、四段的描述可知,18到29岁之间的成人经常上网的人数最多。
34. B。词义猜测题。由该段中的Don’t suppose that teenagers are online more than adults, however以及划线词前的while可知,在一直上网方面,青少年比成人有优势。
35. C。推理判断题。由最后一段中的But it remains to be seen whether being online all the time is actually something to long for, or how constant connectivity will affect American culture in the long term可知,作者担忧从长远看,人们经常上网将会影响美国文化。
第二节:
话题:社会
本文是说明文。文章主要介绍了书的制作和出版过程以及书的发展史。
36. D。下文中的novels, picture books, cookbooks, how-to books, poetry books, and textbooks与D项中的all kinds of subjects相呼应。
37. G。由该空后的They make sure that the ideas are complete, that the writing is clear, and that there are no mistakes可知,G项内容“出版公司的编辑帮助作者改进原稿”符合此处语境。
38. A。本段主要讲述设计者的工作,故A项内容符合此处语境。
39. E。由该空前的books were expensive and hard for most people to get可知,只有富人和有权势的人阅读这些早期的书。
40. C。由该空前的Many books can be read or downloaded from the Internet可知,人们可以在网络上阅读或下载书,这使得图书比以前更容易获取。
英语知识运用:
第一节:
话题:社会
本文是夹叙夹议文。在作者感到孤独的时候,一只小狗的陪伴让作者倍感幸福与被爱。
41. B。由上下文的描述可知,此处表示因果关系,故用“因此(As a result)”。
42. C。由下文中的More often than not I found myself outside playing ... and feeling forgotten可知,当哥哥们的朋友来“玩(play)”时,“我”总感到被冷落了。
43. A。由上文中的I was five years younger than ...可知,“我”太“小(young)”,不适合加入他们的活动。
44. B。由上文中的I often felt left out和该空后的feeling forgotten以及下文的描述可知,很多时候“我”都是“独自(alone)”一人玩,有一种被遗忘的感觉。
45. D。由下文中的I ... my brothers laughing ... felt a single tear coming down my face可知,“我”感到特别“孤独(lonely)”。
46. C。由该空前的We lived miles from town可知,放学后“我”“几乎不能(hardly)”看到自己的朋友。
47. A。由该空后的my brothers laughing可知,“我”“听到(heard)”哥哥们的笑声。
48. D。由上文中的More often than not I found myself outside和I sat in the yard behind our house以及下文中的I went back inside feeling happy可知,哥哥和他的朋友们在家“里(inside)”玩,而“我”躲到后院去玩。
49. A。 由下文中的licking my hand and sitting beside me on the grass可知,“我”看见一只狗“朝我走来(walking to me)”。
50. B。由下文中的he greeted me like ...可知,这只狗很“快乐(happily)”。
51. B。
52. D。 由文中的描述可知,“尽管(even though)”它不认识“我”,但是它像久违的老“朋友(friend)”一样跟“我”打招呼。
53. D。由下文中的let me pour out all my troubles可知,“我”对这只狗“倾诉(talked to)”。
54. C。由文中的描述可知,它给“我”机会倾诉自己的烦恼,“分享(share)”“我”内心深处的想法。
55. D。由文中的描述可知,“我”清楚地“知道(knowing)”“我”被爱着。
56. C。
57. A。 由上文中的felt a single tear coming down my face和I went back inside feeling happy可知,“我”“相信(believe)”,在“我”“难过(sadness)”的时候,那只小狗的出现是来提醒“我”是被爱着的。
58. D。由上文中的I went back inside feeling happy可知,没有什么比知道有人爱着我们能带给我们更大的“欢乐(joy)”。
59. C。知道有人爱着我们也给了我们“力量(strength)”去爱别人。
60. B。由文中的gives us the ... to love others as well可知,此处指与世界分享你的“爱(love)”。
第二节:
61. was waiting。考查过去进行时。此处用了“... be doing ... when ...”结构,表示“……正在……这时突然……”,结合上下文时态可知,应填was waiting。
62. other。考查代词。由one way(一边)可知,此处指“另一边”,故填other。
63. shocked。考查过去分词作主语补足语的用法。设空处作主语补足语,且shock与句子主语pedestrians之间是逻辑上的动宾关系,故填shocked。
64. immediately。考查副词。设空处修饰谓语动词stepped,故填immediately。
65. were injured。考查一般过去时的被动语态。injure与主语head and arm之间是动宾关系,且由语境可知,此处用一般过去时,故填 were injured。
66. treatment。考查名词。 emergency treatment意为“紧急治疗”。
67. to check。考查不定式作状语的用法。“Mamta走过去”是为了“检查受伤的行人”,故填to check。
68. bleeding。考查动词-ing形式作定语的用法。arm与bleed之间是逻辑上的主谓关系,且由语境可知bleed所表示的动作正在进行,故填bleeding。
69. did。考查倒装结构。否定副词Little (一点也不)放在句首句子用部分倒装,且由从句时态可知主句应用一般过去时,故填did。
70. a。考查不定冠词。make a difference意为“起(重要)作用”。