Unit 4 understanding ideas 测试题 新外研必修一 (含答案与解析)

中小学教育资源及组卷应用平台
book 1 unit 4 understanding ideas 测试题
一、用单词的适当形式完成句子
1．This experiment enabled scientists __________ (prove) that despite their poorly developed small eyes, bats still can see during the day.
2．What he has proved is quite true, ________ has been said above.
3．Jane said that she ______ (prefer) staying at home to going around.
4．By middle age, our memory is ________ (significant) worse than when we were young.
5．She sat in the Spanish lab for several hours, trying ________(acquire) the accent of a native speaker.
6．An agreement ______(enable) mutual(相互的) recognition and exchanges of driving permits between the Chinese mainland and the Macao Special Administrative Region will take effect on Tuesday.
7．Let me give another example _____________ (illustrate) the challenges he is faced with.
8．As the popular ________ (say) goes: “every minute counts ”! Set a goal and get ahead !
9．Obviously, there is no need to worry.We’ll have the goods _______(deliver) on time.
10．Rather than stay at home, she preferred ________ (go) with us.
二、阅读理解
A
Most of us probably cannot imagine modern life without social media, which has both the potential to negatively impact our mental and emotional heath if used blindly and the ability to connect us in many unexpected ways.
With social media, friendships go beyond geography. We are able to find friends old and new, thus maintaining old friendships and making new ones. Some would question the quality of these friendships, but perhaps what is important is that a link exists between you and that person. Then, we can possibly build friendship upon this link in the future.
Nevertheless, social media does consume our energy and lower our self-esteem (自尊) at times. A 2013 study by Ethan Kross and Philippe Verduyn, published by the Public Library of Science, found that the more a person uses Facebook, the more miserable he feels about his own life. An internet celebrity (名人) Essena O’Neill recently announced to quit social media, saying it is “not real life”, taking countless photos just to look great in a single post and seeking social approval from “likes” and “views” have left her feeling “empty”.
However, those affected are usually teenagers who possess shaky self-identities. It is only natural for teenagers to seek popularity and social recognition. However, for every teenager who feels jealous, envious or depressed online, there is another who chooses to feel energetic, inspired and accepted by positive social connections.
From what perspective do we wish to approach social media Social media does not cause unhappiness; it simply provides an alternative platform for teenagers to experiment with as they grow up, something they have always done offline. Teen activist and Nobel Peace Prize winner Malala Yousafzai says, “What is interesting is the power and impact of social media... we must try to use social media in a good way.”
11．Which best describes the impact of social media on friendship
A．Social media helps build friendships across distances.
B．Social media improves the quality of new friendships.
C．Social media only has a short-term impact on friendships.
D．Social media makes it harder to maintain old friendships.
12．Why does the author mention “a study” and “a celebrity” in paragraph 3
A．To explain a rule. B．To make a prediction.
C．To present a fact. D．To prove an argument.
13．What’s the author’s attitude towards teenagers using social media
A．Positive. B．Objective. C．Doubtful. D．Indifferent.
14．What may be discussed in the next part of this passage
A．Demand for advances in social media.
B．The wide applications of social media
C．Advice on using social media positively.
D．The possible harm of social media to users.
B
New research suggests that nearly half of American teenagers say they use the internet almost all the time. The results were based on a Pew public opinion study carried out from April 14 to May 4. The study contained 1,316 teens aged 13 to 17 years old. The research found that about 95percent of American teens have smartphones.
The study also asked teens about their social media behavior. It found that the number of teens using Facebook has dropped to 32 percent, down from 71 percent in 2015. The research shows that teens have moved away from Facebook to spend time on the video sharing services YouTube and TikTok. About 95 percent of teens said they use Google-owned YouTube, while 67 percent said they use TikTok.
About 62 percent of the teens said they use Instagram, which is owned by Facebook’s parent company Meta. About 59 percent said they use Snapchat. Less than one fourth of teens said they use Twitter.
The research found that teen boys are more likely than teen girls to use YouTube, or the services Twitch and Reddit. Teen girls were more interested in using TikTok, Instagram and Snapchat. In addition, higher shares of Black teens reported using TikTok, Twitter and WhatsApp compared to white teens.
About 54 percent of teens questioned said it would be “somewhat hard” to give up social media, while 46 percent said it would be “somewhat easy.” About 25 percent of teen boys said giving up social media would be “very easy.” But just 15 percent of teen girls said the same.
Experts in online technology behavior have accused large technology companies of contraposing teens with methods to get them to spend more time on their social media services.
Child rights groups have warned that heavy use of social media services can harm the mind health of young users. They have called on large technology companies to take steps to reduce such harm.
15．Which of the following is no longer popular
A．TikTok. B．Facebook. C．YouTube. D．Instagram.
16．How popular is Twitter among teens
A．Half of them use it. B．None of them use it.
C．The fewest of them use it. D．The majority of them use it.
17．What are the numbers in paragraph 5 about
A．Teens’ favourite for social media. B．Kinds of social media teens use.
C．Benefits of different social media. D．Importance of social media for teens.
18．What does the underlined word “contraposing” in paragraph 6 probably mean
A．Directing at. B．Applying for.
C．Taking control of. D．Getting along with.
三、七选五
The Internet has the power to connect people across the world to a single shared community. Billions of people in different parts of the world have joined it already, and obviously many more will follow. 19
One of the greatest advantages of the Internet lies in the quick and easy access to a huge amount of information. 20 With the click of a mouse or the touch of a button, it is possible to find out almost anything we care to know, from food to travel packages, from news to learning resources. No wonder the Internet has now become the first place that most people turn to for information.
The Internet has also made our lives unbelievably convenient, with all sorts of goods and services provided by electronic commerce (商业), more commonly known as e-commerce. You can have food delivered to you using food delivery apps and sites. 21 There is no need to worry — you can pay for almost everything on your smartphone. Why wait hopelessly for a taxi in the cold rain It is now simple and fast to order one with a taxi app. When you wish to go on holiday, you can make all your travel arrangements just in front of the computer.
22 With all sorts of communication software, physical distance no longer gets in the way. No matter where we are, we are able to keep in contact with loved ones, find long-lost friends and discover whole new communities who share our hobbies. 23
A．Forgot to carry cash
B．However, Internet also has its problems.
C．This enables us to use our time more flexibly.
D．To a certain extent, the world’s knowledge is all at our fingertips.
E．Above all else, the Internet helps us establish and maintain social ties.
F．A message, a group chat, a video call — there are endless ways to share our views.
G．Even in the countryside, the Internet enables people to connect with the outside world.
四、完形填空
I was appreciating my family photos on my computer, admiring my two beautiful babies when I found a(n) 24 scene: my laptop (笔记本电脑) was in almost all the pictures. There was my daughter, 8 months old, playing at my feet while I was 25 on the couch. There was my son, with a big transformer, on my left arms.
I’d heard about the Internet addiction before, but I always thought it was something only 26 playing too much World of Warcraft (a computer game) day and night. Now, it seemed my Internet habit is slowly but surely crossing the 27 . Sometimes I find myself 28 at midnight, surfing the Web 29 my family are sleeping. I read news, keep up with friends and write my blog…just for something to do.
It 30 that I’m not the only mom who is addicted to the computer. A lot of moms are contributing to a growing global addiction. There’s a movement among psychiatrists (doctors who specialize in mental diseases) to 31 the Internet addiction as an official mental disorder. And a recent Stanford University national survey found that 14 percent of Internet users find it 32 to stay away from it for several days; 9 percent try to hide their 33 Internet use from their loved ones; 8 percent admit they use the Web as a way to escape 34 .
You’re likely not the kind of addict who skips baths or abuses drugs to help stay up for more online time. You may have noticed, 35 , that going online has become a necessary part of your life, which, 36 , means a box of clothes go 37 . It may also mean you’re missing much time with your baby--something you probably do 38 about.
24．A．wonderful B．dramatic C．distant D．disturbing
25．A．eating B．typing C．singing D．whispering
26．A．limited to B．devoted to C．belonged to D．glued to
27．A．volume B．bridge C．path D．line
28．A．in B．put C．up D．down
29．A．while B．but C．and D．since
30．A．figures out B．turns out C．sets out D．breaks out
31．A．admit B．desert C．predict D．recognize
32．A．relieving B．shocking C．struggling D．uplifting
33．A．unbearable B．irreplaceable C．unbelievable D．unnecessary
34．A．remarks B．dangers C．discomforts D．threats
35．A．therefore B．however C．otherwise D．moreover
36．A．at least B．above all C．after all D．at most
37．A．undefended B．unnoticed C．unworn D．unwashed
38．A．hesitate B．complain C．care D．set
五、用单词的适当形式完成短文
Avatars are digital 39 (identity), which you use to represent yourself online. The first simple 2D avatars 40 (appear) in role playing computer games in the 1980s. Nowadays avatars have a wide variety of forms and users. People can choose an avatar from a 41 (select) of ready made images, or create their own images. The avatar you choose says a lot about your 42 (personal). Avatars let you express 43 (you) and give you lots of room for 44 (create). But the use of avatars has also caused a few 45 (concern). Some users worry that they are spending so much time in virtual worlds 46 they are becoming afraid of meeting people in the real world. The use of several avatars can also be a source of risk, as people can use avatars to cheat 47 (other) online. However, many people see avatars in a more positive light. They look forward to a time 48 their avatar will act like a real person.
参考答案：
1．to prove
【详解】考查非谓语动词。句意：这项实验使科学家们能够证明，尽管蝙蝠的小眼睛发育不良，但它们在白天仍然可以看到东西。enable sb to do sth是固定句型，动词不定式作宾补。故填to prove。
2．as
【详解】考查定语从句。句意：正如上文所说，他所证明的是完全正确的。分析句子结构可知，空处引导非限定性定语从句。关系词指代前面一整句话的内容，在从句中充当主语，且意为“正如”，所以用关系代词as引导从句。故填as。
3．preferred
【详解】考查动词。句意：简说她宁愿呆在家里也不愿四处走动。空处作宾语从句的谓语动词，主句为一般过去时，故从句也用一般过去。故填preferred。
4．significantly
【详解】考查副词。句意：到了中年，我们的记忆力明显比年轻时差。修饰形容词worse应用副词significantly，意为“显著地”，作状语。故填significantly。
5．to acquire
【详解】考查非谓语动词。句意：她在西班牙语研究所里坐了好几个小时，试图学习以西班牙语为母语的人的口音。分析句子结构，空白处在句子中作宾语，使用非谓语动词，try to do sth为固定短语，含义为“试图做某事”。acquire在此处意为“(通过努力、能力、行为表现)获得，得到”，故填to acquire。
6．enabling
【详解】考查非谓语动词。句意：一项允许中国内地和澳门特别行政区相互承认和交换驾驶执照的协议将于周二生效。句中已有谓语动词will take effect，因此空处填非谓语动词，enable和逻辑主语agreement之间是主动关系，应用现在分词，作后置定语。故填enabling。
7．to illustrate
【详解】考查非谓语动词。句意：让我再举一个例子来说明他所面临的挑战。分析句子结构可知illustrate作目的状语，应用不定式。故填to illustrate。
8．saying
【详解】考查名词。句意：俗话说：“分秒必争”！设定目标并取得成功！分析句子可知，空格处应填入名词作主语。say的名词形式是saying，意为“谚语；格言”。故填saying。
9．delivered
【详解】考查非谓语动词。句意：显然，没有必要担心。我们会按时交货的。分析句子结构可知，此处为“have+宾语+宾补”结构，其中非谓语动词作宾语补足语，deliver与宾语the goods之间为被动关系，所以使用过去分词形式。故填delivered。
10．to go
【详解】考查非谓语。句意：她宁愿和我们一起去，也不愿呆在家里。prefer to do rather than do，意为“宁愿……而不愿……”，符合句意，故填to go。
11．A 12．D 13．B 14．C
【导语】这是一篇说明文。文章主要讲述了社交媒体在日常生活中作用及影响。
11．细节理解题。根据第二段中“With social media, friendships go beyond geography.”（有了社交媒体，友谊就超越了地域。）可知，社交媒体可以让友谊跨越地理区域的界限。故选A。
12．推理判断题。根据第三段“Nevertheless, social media does consume our energy and lower our self-esteem (自尊) at times.”（然而，社交媒体有时确实会消耗我们的精力，降低我们的自尊。）作为本段的中心句，阐述了本段的论题，即社交媒体的负面结果，接下来的研究和名人的事例是作为论据证实本段的论题。故选D。
13．推理判断题。根据倒数第二段“However, those affected are usually teenagers who possess shaky self-identities. It is only natural for teenagers to seek popularity and social recognition. However, for every teenager who feels jealous, envious or depressed online, there is another who chooses to feel energetic, inspired and accepted by positive social connections.”（然而，对于每一个在网上感到嫉妒、嫉妒或沮丧的青少年来说，都有另一个青少年选择感到精力充沛、受到鼓舞和被积极的社会关系所接受。）提及了社交媒体的客观性。最后一段中“ Social media does not cause unhappiness; it simply provides an alternative platform for teenagers to experiment with as they grow up, something they have always done offline.”（社交媒体不会导致不快乐；它只是为青少年提供了一个在成长过程中尝试的替代平台，这是他们一直在线下做的事情。）可知，作者认为社交媒体只是为青少年提供了一个在成长过程中尝试的替代平台，并不会导致不快乐。每一个在网上感到嫉妒、嫉妒或沮丧的青少年，都有另一个选择感到精力充沛、受到鼓舞和被积极的社会关系所接受。可推知，作者是客观地描述社交媒体，故选B。
14．推理判断题。根据最后一段中““What is interesting is the power and impact of social media... we must try to use social media in a good way.”（“有趣的是社交媒体的力量和影响……我们必须努力以一种好的方式使用社交媒体。”）提到了使用社交媒体要用好的方式。因此可推知，接下来的内容应该提及关于积极使用社交媒体的建议。故选C。
15．B 16．C 17．D 18．A
【导语】这是一篇说明文，新的研究表明，近一半的美国青少年表示他们几乎一直在使用互联网。
15．细节理解题。根据第二段第二、三句的内容“It found that the number of teens using Facebook has dropped to 32 percent, down from 71 percent in 2015. The research shows that teens have moved away from Facebook to spend time on the video sharing services YouTube and TikTok.(它发现，使用Facebook的青少年人数已从2015年的71%降至32%。研究表明，青少年已经不再使用Facebook，而是把时间花在视频分享服务YouTube和TikTok上)”可知，研究发现，使用Facebook的青少年人数从2015年的71%下降到32%。青少年已经离开了Facebook，把时间花在视频分享服务YouTube和TikTok上。即Facebook不再受欢迎。故选B。
16．细节理解题。根据第三段的内容“About 62 percent of the teens said they use Instagram, which is owned by Facebook’s parent company Meta. About 59 percent said they use Snapchat. Less than one fourth of teens said they use Twitter.(约62%的青少年表示他们使用Instagram，该网站隶属于Facebook的母公司Meta。约59%的人表示他们使用Snapchat。不到四分之一的青少年说他们使用Twitter)”可知，使用Twitter的人数最少。故选C。
17．推理判断题。根据第五段的内容“About 54 percent of teens questioned said it would be “somewhat hard” to give up social media, while 46 percent said it would be “somewhat easy.” About 25 percent of teen boys said giving up social media would be “very easy.” But just 15 percent of teen girls said the same.(约54%的受访青少年表示，放弃社交媒体“有些困难”，而46%的人表示“有些容易”。大约25%的青少年男孩表示，放弃社交媒体“非常容易”。但是只有15%的少女有同样的想法)”可知，本段中的数据是关于社交媒体对青少年的重要性。故选D。
18．词义猜测题。根据划线词后面的“to get them to spend more time on their social media services(让他们花更多的时间在社交媒体服务上)”可知，研究网络科技行为的专家指责大型科技公司用各种方法针对青少年，让他们在社交媒体服务上花更多时间来。此处contraposing的意思是“针对”，与directing at是同义词。故选A。
19．G 20．D 21．A 22．E 23．F
【导语】本文是一篇说明文。文章介绍了网络带给我们的益处，包括快速容易地获取信息、让我们的生活更加便利、拉近大家的距离等。
19．前文“Billions of people in different parts of the world have joined it already, and obviously many more will follow.”（世界各地的数十亿人已经加入了这个行列，显然还会有更多的人加入。）说明越来越多的人开始使用网络，G项“Even in the countryside, the Internet enables people to connect with the outside world.”（即使在农村，互联网也使人们能够与外界联系。）与前文有递进关系，符合语境。故选G。
20．前文“One of the greatest advantages of the Internet lies in the quick and easy access to a huge amount of information.”（互联网最大的优点之一在于可以快速方便地获取大量的信息。）是段首句，点明了网络可以让人快速容易地获取信息的段落主旨，D项“To a certain extent, the world’s knowledge is all at our fingertips.”（在某种程度上，世界上的知识都在我们的指尖。）与前文意思一致，符合语境。故选D。
21．本段主要意思为网络让我们的生活更加便利，后文“There is no need to worry — you can pay for almost everything on your smartphone.”（没有必要担心——你可以用智能手机支付几乎所有的东西。）说明可以用手机支付，A项“Forgot to carry cash ”（忘了带现金？）与后文衔接自然，符合语境。故选A。
22．空处位于段首，需概括段落主旨，后文“With all sorts of communication software, physical distance no longer gets in the way. No matter where we are, we are able to keep in contact with loved ones, find long-lost friends and discover whole new communities who share our hobbies.”（有了各种各样的通信软件，物理距离不再成为障碍。无论我们在哪里，我们都能与所爱的人保持联系，找到久违的朋友，发现与我们有共同爱好的全新社区。）说明网络可以拉近人与人的距离，E项“Above all else, the Internet helps us establish and maintain social ties.”（最重要的是，互联网帮助我们建立和维持社会关系。）与段落大意相符。故选E。
23．前文“No matter where we are, we are able to keep in contact with loved ones, find long-lost friends and discover whole new communities who share our hobbies.”（无论我们在哪里，我们都能与所爱的人保持联系，找到久违的朋友，发现与我们有共同爱好的全新社区。）说明网络可以让人与人之间保持紧密的联系，F项“A message, a group chat, a video call — there are endless ways to share our views.”（一条消息，一个群聊，一个视频通话——有无数种方式来分享我们的观点。）承接前文，符合语境。故选F。
24．D 25．B 26．A 27．D 28．C 29．A 30．B 31．D 32．C 33．D 34．C 35．B 36．A 37．D 38．C
【导语】本文是一篇夹叙夹议的文章。 文章讲述作者通过自己的例子说明很多妈妈成为了网瘾患者而这些上网的时间本可以用来做更有意义的事情。
24．考查形容词词义辨析。句意：我正在电脑上欣赏我的家庭照片，欣赏我的两个漂亮的宝宝，这时我发现了一个令人不安的场景：我的笔记本电脑几乎出在所有的照片中。A. wonderful精彩的；B. dramatic戏剧性的；C. distant遥远的；D. disturbing令人不安的。根据下文“my laptop(笔记本电脑) was in almost all the pictures.”可知，这个场景令人不安。故选D。
25．考查动词词义辨析。句意：我8个月大的女儿在我脚边玩耍，而我则在沙发上打字。A. eating吃；B. typing打字；C. singing唱歌；D. whispering悄悄说。根据上文“my laptop (笔记本电脑) was in almost all the pictures.”可知，空处和电脑相关，只有打字符合语境，故选B。
关。故选B。
26．考查动词短语词义辨析。句意：我以前听说过网瘾，但我一直认为网瘾只局限于指的是没日没夜地玩魔兽世界(一种电脑游戏)。A. limited to被限制……，局限于；B. devoted to投入；C. belonged to属于；D. glued to贴在……。根据本句“playing too much World of Warcraft (a computer game) day and night.”可知作者对于网瘾的认知不全面，故选A。
27．考查名词词义辨析。句意：现在，我的上网习惯似乎慢慢地但肯定地越线了。A. volume体积；B. bridge桥梁；C. path道路；D. line线。根据下文“Sometimes I find myself 　　5　　 at midnight, surfing the Web 　　6　　 my family are sleeping.”可知，作者现在上网越来越频繁，上网习惯越来越过分，短语cross the line (越线)，符合语境。故选D。
28．考查副词和动词词义辨析。句意：有时我发现自己半夜起来，在我的家人睡觉的时候上网。A. in里面；B. put放；C. up向上；D. down向下。根据上文“Now, it seemed my Internet habit is slowly but surely crossing the 　　4　　.”可知，作者是半夜起床上网。故选C。
29．考查连词词义辨析。句意：有时我发现自己半夜起来，在我的家人睡觉的时候上网。A. while当……时，然而；B. but但是；C. and和，也；D. since自从。根据上文“Sometimes I find myself 　　5　　 at midnight”可知，此时是半夜，所以应该是家人们睡觉的时候。故选A。
30．考查动词短语词义辨析。句意：原来我不是唯一一个对电脑上瘾的妈妈。A. figures out弄清楚；B. turns out结果是，原来是；C. sets out出发，开始；D. breaks out爆发。根据下文“A lot of moms are contributing to a growing global addiction.”可知，原来有了一定的发现，自己不是唯一—个对电脑上瘾的妈妈。故选B。
31．考查动词词义辨析。句意：精神科医生(专门研究精神疾病的医生)之间有一场运动，正式承认网瘾是一种精神疾病。A. admit承认，允许进入；B. desert抛弃；C. predict预测；D. recognize认为。根据下文“as an official mental disorder”可知，正式承认网瘾是一种精神疾病。所填单词应该和as构成固定搭配。短语: recognize… as…，译为“承认……”，符合句意，故选D。
32．考查形容词词义辨析。句意：斯坦福大学最近的一项全国调查发现：14%的互联网用户发现很难一连几天不上网；9%的人试图向所爱的人隐瞒他们不必要的上网行为；8%的人承认他们把网络作为逃避不适的一种方式。 A. relieving救助的；B. shocking令人震惊的；C. struggling艰难的；D. uplifting令人振奋的。根据上文“It 　　7　　 that I’m not the only mom who is addicted to the computer.”可知，本段讲的是网瘾，对于有网瘾的人来说，应该是很难不上网。故选C。
33．考查形容词词义辨析。句意：同上。A. unbearable无法忍受的；B. irreplaceable不可取代的；C. unbelievable难以置信的；D. unnecessary没有必要的。根据上文“It 　　7　　 that I’m not the only mom who is addicted to the computer.”可知，本段讲的是网瘾，而对于有网瘾的人来说，上网并不一定是有必要的事情去完成，只是有瘾。所以他们想要隐瞒的应该是没有必要去上网的行为。故选D。
34．考查名词词义辨析。句意：同上。A. remarks评论；B. dangers危险；C. discomforts不适；D. threats威胁。根据空前的“escape”可知，应该是逃避某个不好的东西。而上文提到的是有网瘾，有网瘾的人是将网络视作逃避现实生活中的种种不适。故选C。
35．考查副词词义辨析。句意：你可能已经注意到，虽然上网已经成为你生活中必不可少的一部分，但这至少意味着一箱衣服没洗。A. therefore因此；B. however然而；C. otherwise否则； D. moreover而且。根据上文“You’re likely not the kind of addict who skips baths or abuses drugs to help stay up for more online time.”以及下文“that going online has become a necessary part of your life”可知，两句之间存在转折关系。故选B。
36．考查短语词义辨析。句意：你可能已经注意到，虽然上网已经成为你生活中必不可少的一部分，但这至少意味着一箱衣服没洗。A. at least至少；B. above all最重要的是；C. after all毕竟；D. at most至多。根据上文“that going online has become a necessary part of your life”可知，即便上网没有使你失去很多，但是至少意味着这些时间本可以用来洗衣服。故选A,
37．考查形容词词义辨析。 句意：同上。A. undefended无防备的； B. unnoticed未被注意到的； C. unworn没有磨损的；D. unwashed没有洗的。根据空前“means a box of clothes go”可知，上网的时间会导致衣服没有洗。故选D。
38．考查动词词义辨析。句意：这也可能意味着你错过了很多和你的宝宝在一起的时间，而这可能是你真正关心的事情。A. hesitate犹豫；B. complain抱怨；C. care关心；D. set设定。根据上文“It may also mean you’re missing much time with your baby”可知，上网浪费的是你和宝宝在一起的时光，对于母亲而言，这样的时光是她真正关心的。故选C。
39．identities 40．appeared 41．selection 42．personality 43．yourself 44．creativity 45．concerns 46．that 47．others 48．when
【导语】这是一篇说明文。文章介绍了在电脑游戏或聊天室中代表使用者的头像的好处及其引起的担忧。
39．考查名词复数。句意：头像是数字身份，你可以用它在网上代表自己。结合主语Avatars复数可知，不止一个数字身份，用可数名词identity的复数形式。故填identities。
40．考查时态。句意：20世纪80年代，第一批简单的2D头像出现在角色扮演电脑游戏中。结合时间状语in the 1980s，谓语动词appear用一般过去时。故填appeared。
41．考查名词。句意：人们可以从现成的图片中选择一个头像，也可以创建自己的图片。不定冠词a后接可数名词selection的单数形式，a selection of (……的选择)。故填selection。
42．考查名词。句意：你选择的头像说明了你的个性。此处指一个头像所反映出的某一方面的个性，用可数名词单数personality作宾语。故填personality。
43．考查反身代词。句意：头像可以让你表达自己，给你很大的创造力空间。结合句意可知是“你表达你自己”，用反身代词yourself。故填yourself。
44．考查名词。句意：头像可以让你表达自己，给你很大的创造力空间。用不可数名词creativity作宾语。故填creativity。
45．考查名词复数。句意：但头像的使用也引起了一些担忧。由a few修饰，用可数名词concern的复数形式。故填concerns。
46．考查结果状语从句。句意：一些用户担心他们在虚拟世界中花费了太多时间，以至于他们害怕在现实世界中与人接触。so…that (如此……以至于)引导结果状语从句。故填that。
47．考查代词。句意：使用好几个头像也可能是一个风险来源，因为人们可以使用头像在网上欺骗他人。结合句意，用代词others (其他人)作宾语。故填others。
48．考查定语从句关系词。句意：他们期待着有一天他们的头像会表现得像个真人。该空引导限制性定语从句，先行词是a time，关系词在从句中做时间状语，用关系副词when。故填when。
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