内容正文:
Unit 4 Space Exploration【单元卷•考点卷】
满分100分,时间90分钟
一.拓展词汇(14分)
1. adj.精神的;思想的→ adv.思想上;智力上;精神上
2. adj.有智慧的;聪明的;有智力的→ n.智力;才智;智慧
3. vt.查明;确定;决定→ adj.有决心的;意志坚定的→ n.决心;果断;决定
4. vt.& vi.传输;发送→ n.传输,播送;变速器;传送,传递,传达
5. adj.失望的;沮丧的→ adv.失望地→ adj.令人失望的;令人沮丧的;令人扫兴的→ adv.令人失望地;令人扫兴地→ n.失望;沮丧→ vt.使失望;使破灭
6. n.渴望;欲望 vt.渴望;期望→ adj.理想的;值得拥有的;可取的;值得做的
7. adj.独立的;自立的→ adv.独立地;自立地→ n.独立;自立;自主
8. n.地球;世界;地球仪→ adj.全世界的;全球的;整体的→ adv.全球范围内;全局地
9. vt.& vi.论证;争辩;争论→ n.争论;争吵;论点
10. n.(对事物的)分析;分析结果→ v.分析
11. adj.定期的;经常的;正常的→ adv.经常;定期地
12. adj.有限的→ n.界限;限制;限度 v.限制;限定;限量→ adj.无限的
13. n.神秘事物;谜→ adj.神秘的,难以解释的
14. vt.系;绑;贴→ adj.依恋;附属于;所附的→ n.附属物;依恋,爱慕;连接;附件
1.mental;mentally 2.intelligent;intelligence 3.determine;determined;determination 4.transmit;transmission 5.disappointed;disappointedly;disappointing;disappointingly;disappointment;disappoint 6.desire;desirable
7.independent;independently;independence 8.globe;global;globally9.argue;argument 10.analysis;analyse 11.regular;regularly 12.limited;limit;limitless 13.mystery;mysterious 14.attach;attached;attachment
二.单词拼写(14分)
1.This spacecraft is able to accommodate three (宇航员).
2.The (人造卫星) are used for sending and receiving messages.
3.The (程序)appealed to the staff a lot when it was introduced in January.(2021天津3月)
4.Approaching the (车辆), we saw that a woman was trying to get out of the broken window.
5.The earth is nothing but a very small planet in the endless (/ˈjuːnɪvɜːs/).
6.My money is (/səˈfɪʃnt/), and I want to buy a gift for my mother.
7.You should get up early tomorrow morning, (否则) you'll be late for school.
8.New educational (设施) as well as more public space were added in our school.
9.Cars will run on s power and they will be much cleaner.
10.Training was held for tour guides who should encourage visitors to participate in garbage sorting and (回收利用) during tours.
11.The exercises are designed to strengthen your stomach (肌肉).
12.We should take care of these precious natural (资源) wisely.
13.He doesn't want tomorrow to follow the usual (模式), and he plans to make a surprise for his wife.
14.Knowing that you're looking for volunteers to [/ˈmɒnɪtə(r)/] the water quality of the river, I'd like to be one of them.
1.astronauts 2.satellites 3.procedure 4.vehicle 5.universe6.sufficient 7.otherwise 8.facilities 9.solar 10.recycling11.muscles 12.resources 13.pattern 14.monitor
三.单句语法填空(21分)
1.A child's (intelligent) develops rapidly between the ages of zero and three.
2.As we have learned in the history class, the country gained (independent) after a long struggle.
3.During almost a year of recovery, Mr. Wang turned to music to help himself heal both physically and (mental).
4.The chairman (signal) the staff to leave the meeting room from this exit just now.
5.After failing the examination, he naturally felt (disappoint) and frustrated, but he didn't lose heart. He determined (work) hard and catch up with others.
6.Our teacher says we all have the ability (solve) problems as long as we have faith in ourselves.
7.Looking back on my high school time, I admit it is very tiring, but the busy days really make me happy and (satisfy).
8.The matter you come up with is (current) being discussed.
9.I'm keen providing signers for deaf people and readers for the blind.
10.After studying the map, we figured that our car was parked three kilometers away.
11.I can't think of any words to describe the beauty here. Its beauty is description, which attracts numerous visitors from all over the world.
12.She was afraid of making an exhibition of herself. This was she was (lack) in training.
13.According to the World Wide Fund for Nature, the (globe) black rhino population has dropped as low as 5,500.
14.Your time with your doctor is (limit), so preparing a list of questions can help you make the most of your appointment.
15.Debaters use quotations and scientific research data, trying to make all their (argue) more convincing.
16.We make decisions based on facts and many (analysis) of these aspects.
17.We meet (regular), once a month, to exchange ideas about the newly read books.
18.Don't you think the universe is very (mystery)?There are many unknown things out there.
19.I appeal to companies to attach more importance ability and employ college students who are competent or have great potential.
20.One way to inspire the young is to tell stories about achievements that result hard work.
21.I am writing (apply) for a position as a volunteer of the Chinese Painting Exhibition to be held in your art gallery.
1.intelligence 考查名词。句意:儿童的智力在零到三岁之间发展迅速。根据空前的A child’s可知此处需要用名词作主语,intelligence为不可数名词。故填intelligence。
2.independence 考查名词。句意:正如我们在历史课上学到的,这个国家经过长期斗争后获得了独立。设空处作动词gained的宾语,因此用名词。故填independence。
3.mentally 考查副词。句意:在将近一年的恢复过程中,王先生转向音乐来帮助自己在身体上和精神上痊愈。设空处与physically并列作状语。故填mentally。
4.signaled/signalled 考查动词的时态。句意:刚才主持人示意员工从这个出口离开会议室。分析句子成分可知,设空处作谓语,根据句中的时间状语just now可知应用一般过去时。故填signaled或signalled。
5.disappointed;to work 考查形容词和动词不定式。句意:考试不及格后,他自然感到失望和沮丧,但是他没有失去信心。他决心努力学习,赶上别人。第一空所填词与frustrated并列,都是表示主语的感受,因此应填disappointed;determine to do sth.意为“决心做某事”,故第二空填to work。
6.to solve 考查动词不定式。句意:我们的老师说只要我们对自己有信心,我们都有解决问题的能力。the ability to do sth.意为“做某事的能力”,动词不定式作后置定语,修饰ability。故填to solve。
7.satisfied 考查形容词。句意:回顾我的高中时光,我承认那很累,但忙碌的日子真的让我很快乐、很满足。此处是“make+宾语+宾语补足语”结构,设空处与and前面的happy为并列成分,宾语为me(指人),故填satisfied。
8.currently 考查副词。句意:你提出的问题目前正在被讨论。设空处作状语,应用副词。故填currently。
9.on 考查介词。句意:我热衷于为失聪者提供手语译员,为盲人提供朗读员。be keen on doing sth.意为“热衷于做某事”。故填on。
10.out 考查固定搭配。句意:研究地图后,我们弄清楚了我们的车停在三千米外。figure out意为“弄清楚;弄懂”。故填out。
11.beyond 考查介词。句意:我想不出任何言语来形容这里的美。它的美难以形容,吸引着众多来自世界各地的游客。beyond description意为“难以形容”。故填beyond。
12.because;lacking 考查表语从句和形容词。句意:她担心出洋相。这是因为她缺乏训练。结合句意可知,第一空后面说的是原因,应用because,This was because...意为“这是因为……”;be lacking in...意为“缺乏……”,lacking为形容词,意为“缺乏的”。故第一空填because,第二空填lacking。
13.global 考查形容词。句意:根据世界自然基金会的数据,全球黑犀牛的数量已经下降到5,500头。修饰名词population应用形容词,故填global。
14.limited 考查形容词。句意:你和医生在一起的时间是有限的,所以准备一个问题清单可以帮助你充分利用你的约定时间。分析句子成分可知,设空处作表语,结合句意可知此处表示“有限的”,应用形容词limited。
15.arguments 考查名词及其复数形式。句意:辩论者使用引文和科学研究数据,试图使他们所有的论据更有说服力。设空处作make的宾语,故应用名词形式,argument表示“论点,论据”时为可数名词,根据空前面的all their可知应用复数形式,故填arguments。
16.analyses 考查名词复数。句意:我们根据事实和对这些方面的许多分析作出决定。由设空处前面的many可知此处应用复数名词analyses。
类比启发 analysis变为复数为不规则变化,将sis变为ses,类似这种变化的词还有:crisis→crises(危机);basis→bases(基础);thesis→theses(论文);diagnosis→diagnoses(判断,诊断)。
17.regularly 考查副词。句意:我们定期会面,每月一次,就新读的书交换看法。设空处修饰动词meet,应用副词。故填regularly。
18.mysterious 考查形容词。句意:你不觉得宇宙非常神秘吗?那里有很多未知的事物。设空处位于is之后,作表语,且前面有副词very,应用形容词mysterious。
19.to 考查介词。句意:我呼吁公司更加重视能力,雇用有能力或者有很大潜力的大学生。attach importance to...意为“重视……”。故填to。
20.from 考查固定搭配。句意:激励年轻人的一种方法是讲述关于成就源于辛勤工作的故事。result from意为“因……发生;随……产生”。故填from。
易错归因 本题容易误填in,原因在于没有弄清楚result in和result from的区别。result in表示“导致,造成”,后面内容表示结果;result from表示“因……发生,随……产生”,后面内容表示原因。本题中hard work(努力工作)是achievements(成就)的原因,故用result from。
21.to apply 考查动词不定式作目的状语。句意:我写这封信是为了申请要在贵美术馆举办的中国绘画展览志愿者的职位。结合句意可知此处应用动词不定式作目的状语。故填to apply。
四.完成句子(16分)
1.为了提高社区服务水平,一些社区已开展志愿者项目。(launch)
the level of community service, some communities volunteer programs.
2.她的话给我留下了深刻的印象,我决心帮助这个家庭摆脱困境。(determined)
Deeply impressed by her words, I the family out of trouble.
3.我渴望成为下周一举行的会议的志愿者。(一句多译)
①I a volunteer for the meeting to be held next Monday. (desire v.)
②I a volunteer for the meeting to be held next Monday. (desire n.)
4.和他争论这个问题没有用,因为他不会改变主意。(argue)
It's no use the question, for he won't change his mind.
5.杰夫的手碰到了滚烫的炉子,他痛苦地哭了起来。珍娜让他把手放在冷水里。(make+宾语+宾语补足语)
Jeff's hand touched the hot burner and he gave a cry of pain. Jenna his hand in cold water.(读后续写—动作描写)
6.我没有规划如何合理地使用我的零花钱,所以仅过去两周,我的钱就已经用完了。(一句多译)
①I didn't plan how to use my pocket money properly, so only after two weeks, .(run out of/use up)
②I didn't plan how to use my pocket money properly, so only after two weeks, .(run out/give out)
7.尽管困难重重,但科学家们希望做出更多有价值的能使人类很好地生存到未来的发现。
, scientists hope to make more valuable discoveries that will enable the human race to survive well into the future.
8.看到我们的星球如同黑海中的一座岛屿的照片让人们意识到我们星球的资源是有限的。
Seeing pictures of our planet as an island in a black sea that our planet's resources are limited.
1. the disappointed looks 2.was determined to capture3.①desire to be ②have a desire to be4.arguing with him about/over 5.made him put6.①I have run out of/used up my money ②my money has run out/given out
7.Despite the difficulties8.make people realise
五.课文语法填空(20分)
A
When looking up at the stars, people have always wondered about space. Before the mid-20th century, most people felt travelling into space was 1 impossible dream. However, with the help of scientists, people succeeded in 2 (realize) their dream to explore space. On 4 October 1957, the Sputnik 1 satellite 3 (launch) by the USSR. While scientists try to make sure nothing 4 (go) wrong, accidents can still happen. These disasters brought much sadness and 5 (disappoint), 6 people still believe in the importance of carrying on space exploration. Although China's space programme started later 7 those of Russia and the US, it has made great progress in a short time. China became the third country to 8 (independent) send humans into space in 2003, 9 Yang Liwei successfully orbited Earth in the Shenzhou 5 spacecraft. In spite of the difficulties, scientists hope to make more discoveries that will enable us 10 (survive) well into the future.
1.an 考查冠词。此处指大多数人认为太空旅行是一个不可能实现的梦想。dream为可数名词,此处表泛指,且impossible以元音音素开头,所以用不定冠词an。
2.realizing 考查动名词。succeed in doing sth.意为“成功做某事”。故填realizing。
3.was launched 考查动词的时态、语态和主谓一致。分析句子成分可知,此处作谓语,由时间状语 On 4 October 1957可知应用一般过去时;the Sputnik 1 satellite与launch之间为被动关系,且主语为第三人称单数。故填was launched。
4.goes 考查动词的时态和主谓一致。分析句子成分可知,此处作宾语从句中的谓语,结合让步状语从句和主句的时态可知,此处应用一般现在时;宾语从句的主语为nothing,故填goes。
5.disappointment 考查名词。设空处和前面的sadness并列,都作brought的宾语,也应用名词。故填disappointment。
6.but 考查连词。分析句子结构可知,设空处前后都是完整的句子,且在意思上存在转折关系,所以应用表示转折的并列连词连接。故填but。
7.than 考查介词。根据设空处前面的比较级later可知,这里用介词than。
8.independently 考查副词。设空处修饰动词不定式to send,应用副词。故填independently。
9.when 考查定语从句。设空处无提示词且前面有逗号,结合语境可以推测设空处引导非限制性定语从句,修饰先行词2003,关系词在从句中作时间状语。故填when。
10.to survive 考查动词不定式。enable sb. to do sth.意为“使某人能够做某事”。故填to survive。
B
Billions of dollars and lots of time are spent on various space missions, whether to Mars 1 other planets much further away.
Firstly, 2 (explore) space has played an important role in the fight against world hunger. A number of the satellites record data on land and weather patterns. As 3 result, space-based science has helped in growing enough food 4 (feed) the increasing population.
Secondly, space exploration has promoted technological 5 (improve) that are beneficial to us. High-end products around the world 6 (make) to a higher standard now due to advanced technology 7 was created to meet the requirements for space exploration.
8 (final), sending astronauts into space has helped people to solve the world's problems. Seeing pictures of our planet in the universe made people realise that our planet's resources are 9 (limit). The greatest attention at present is on Mars. In the future, humans may live on both planets.
10 closing, space exploration provides many different benefits for the world.
1.or 考查连词。whether...or...为固定结构,意为“无论……还是……”。
2.exploring 考查动名词。分析句子成分可知,设空处在句中作主语,此处指太空探索已经在对抗世界饥饿的斗争中发挥了重要作用,表示一般的、抽象的动作,应用动名词作主语。故填exploring。
3.a 考查冠词。as a result为固定短语,意为“结果”。
4.to feed 考查动词不定式。此处指种足够多的食物以供养不断增加的人口,应用动词不定式作目的状语,故填to feed。
5.improvements 考查名词及其单复数。设空处作及物动词promoted的宾语,且前面有形容词,因此应该用名词;再根据其后的定语从句中的谓语动词are可知,此处应该用名词的复数形式。故填improvements。
6.are made 考查动词的时态、语态和主谓一致。products与make之间是被动关系,因此应该用被动语态;结合后面的now和语境可知,此处应该用一般现在时,且主语为复数形式,故填are made。
7.that/which 考查定语从句的关系词。设空处无提示词,空前为名词短语advanced technology,空后缺主语,将空前的名词短语代入设空处,句意、结构完整,所以推知设空处引导定语从句且在从句中作主语,指物,所以用that或which。
8.Finally 考查副词。提示词是形容词,且后面有逗号隔开,所以此处用副词作状语来修饰整个句子。注意首字母大写,故填Finally。
9.limited 考查形容词。此处指我们星球的资源是“有限的”,应用形容词作表语,故填limited。
10.In 考查介词。in closing为固定搭配,意为“最后”。注意首字母大写,故填In。
六.书面表达(15分)
目前,城市里越来越多的人养宠物,对此《中学生英语报》组织了一场讨论:城市里是否应该饲养宠物。请你根据下表所提供的信息,介绍讨论的情况,并说明自己的观点和建议。
支持饲养宠物
反对饲养宠物
你的观点
1.安慰孤寡老人;
2.与动物和谐相处,增添生活乐趣。
1.造成环境污染;
2.吵闹扰民,甚至伤人。
……
注意:
1.词数80 左右;
2.可适当增加细节,以使行文连贯;
3.开头已为你写好,不计入总词数。
Recently we have had a heated discussion on whether people should keep pets at home in cities.
Recently we have had a heated discussion on whether people should keep pets at home in cities. Some students think it’s a good idea to keep pets because old people who live alone at home can get some comfort from pets. Besides, getting along well with animals will make our life interesting. On the contrary, the other students are against the idea. In their opinion, if too many people keep pets at home, it will be bad for the environment. What is worse, pets may make too much noise and even attack people.
I like animals, so I don’t think it is bad to keep pets at home. But we must take some measures to prevent them from polluting our environment and attacking people.
1
学科网(北京)股份有限公司
$$
Unit 4 Space Exploration【单元卷•考点卷】
满分100分,时间90分钟
一.拓展词汇(14分)
1. adj.精神的;思想的→ adv.思想上;智力上;精神上
2. adj.有智慧的;聪明的;有智力的→ n.智力;才智;智慧
3. vt.查明;确定;决定→ adj.有决心的;意志坚定的→ n.决心;果断;决定
4. vt.& vi.传输;发送→ n.传输,播送;变速器;传送,传递,传达
5. adj.失望的;沮丧的→ adv.失望地→ adj.令人失望的;令人沮丧的;令人扫兴的→ adv.令人失望地;令人扫兴地→ n.失望;沮丧→ vt.使失望;使破灭
6. n.渴望;欲望 vt.渴望;期望→ adj.理想的;值得拥有的;可取的;值得做的
7. adj.独立的;自立的→ adv.独立地;自立地→ n.独立;自立;自主
8. n.地球;世界;地球仪→ adj.全世界的;全球的;整体的→ adv.全球范围内;全局地
9. vt.& vi.论证;争辩;争论→ n.争论;争吵;论点
10. n.(对事物的)分析;分析结果→ v.分析
11. adj.定期的;经常的;正常的→ adv.经常;定期地
12. adj.有限的→ n.界限;限制;限度 v.限制;限定;限量→ adj.无限的
13. n.神秘事物;谜→ adj.神秘的,难以解释的
14. vt.系;绑;贴→ adj.依恋;附属于;所附的→ n.附属物;依恋,爱慕;连接;附件
二.单词拼写(14分)
1.This spacecraft is able to accommodate three (宇航员).
2.The (人造卫星) are used for sending and receiving messages.
3.The (程序)appealed to the staff a lot when it was introduced in January.(2021天津3月)
4.Approaching the (车辆), we saw that a woman was trying to get out of the broken window.
5.The earth is nothing but a very small planet in the endless (/ˈjuːnɪvɜːs/).
6.My money is (/səˈfɪʃnt/), and I want to buy a gift for my mother.
7.You should get up early tomorrow morning, (否则) you'll be late for school.
8.New educational (设施) as well as more public space were added in our school.
9.Cars will run on s power and they will be much cleaner.
10.Training was held for tour guides who should encourage visitors to participate in garbage sorting and (回收利用) during tours.
11.The exercises are designed to strengthen your stomach (肌肉).
12.We should take care of these precious natural (资源) wisely.
13.He doesn't want tomorrow to follow the usual (模式), and he plans to make a surprise for his wife.
14.Knowing that you're looking for volunteers to [/ˈmɒnɪtə(r)/] the water quality of the river, I'd like to be one of them.
三.单句语法填空(21分)
1.A child's (intelligent) develops rapidly between the ages of zero and three.
2.As we have learned in the history class, the country gained (independent) after a long struggle.
3.During almost a year of recovery, Mr. Wang turned to music to help himself heal both physically and (mental).
4.The chairman (signal) the staff to leave the meeting room from this exit just now.
5.After failing the examination, he naturally felt (disappoint) and frustrated, but he didn't lose heart. He determined (work) hard and catch up with others.
6.Our teacher says we all have the ability (solve) problems as long as we have faith in ourselves.
7.Looking back on my high school time, I admit it is very tiring, but the busy days really make me happy and (satisfy).
8.The matter you come up with is (current) being discussed.
9.I'm keen providing signers for deaf people and readers for the blind.
10.After studying the map, we figured that our car was parked three kilometers away.
11.I can't think of any words to describe the beauty here. Its beauty is description, which attracts numerous visitors from all over the world.
12.She was afraid of making an exhibition of herself. This was she was (lack) in training.
13.According to the World Wide Fund for Nature, the (globe) black rhino population has dropped as low as 5,500.
14.Your time with your doctor is (limit), so preparing a list of questions can help you make the most of your appointment.
15.Debaters use quotations and scientific research data, trying to make all their (argue) more convincing.
16.We make decisions based on facts and many (analysis) of these aspects.
17.We meet (regular), once a month, to exchange ideas about the newly read books.
18.Don't you think the universe is very (mystery)?There are many unknown things out there.
19.I appeal to companies to attach more importance ability and employ college students who are competent or have great potential.
20.One way to inspire the young is to tell stories about achievements that result hard work.
21.I am writing (apply) for a position as a volunteer of the Chinese Painting Exhibition to be held in your art gallery.
四.完成句子(16分)
1.为了提高社区服务水平,一些社区已开展志愿者项目。(launch)
the level of community service, some communities volunteer programs.
2.她的话给我留下了深刻的印象,我决心帮助这个家庭摆脱困境。(determined)
Deeply impressed by her words, I the family out of trouble.
3.我渴望成为下周一举行的会议的志愿者。(一句多译)
①I a volunteer for the meeting to be held next Monday. (desire v.)
②I a volunteer for the meeting to be held next Monday. (desire n.)
4.和他争论这个问题没有用,因为他不会改变主意。(argue)
It's no use the question, for he won't change his mind.
5.杰夫的手碰到了滚烫的炉子,他痛苦地哭了起来。珍娜让他把手放在冷水里。(make+宾语+宾语补足语)
Jeff's hand touched the hot burner and he gave a cry of pain. Jenna his hand in cold water.(读后续写—动作描写)
6.我没有规划如何合理地使用我的零花钱,所以仅过去两周,我的钱就已经用完了。(一句多译)
①I didn't plan how to use my pocket money properly, so only after two weeks, .(run out of/use up)
②I didn't plan how to use my pocket money properly, so only after two weeks, .(run out/give out)
7.尽管困难重重,但科学家们希望做出更多有价值的能使人类很好地生存到未来的发现。
, scientists hope to make more valuable discoveries that will enable the human race to survive well into the future.
8.看到我们的星球如同黑海中的一座岛屿的照片让人们意识到我们星球的资源是有限的。
Seeing pictures of our planet as an island in a black sea that our planet's resources are limited.
五.课文语法填空(20分)
A
When looking up at the stars, people have always wondered about space. Before the mid-20th century, most people felt travelling into space was 1 impossible dream. However, with the help of scientists, people succeeded in 2 (realize) their dream to explore space. On 4 October 1957, the Sputnik 1 satellite 3 (launch) by the USSR. While scientists try to make sure nothing 4 (go) wrong, accidents can still happen. These disasters brought much sadness and 5 (disappoint), 6 people still believe in the importance of carrying on space exploration. Although China's space programme started later 7 those of Russia and the US, it has made great progress in a short time. China became the third country to 8 (independent) send humans into space in 2003, 9 Yang Liwei successfully orbited Earth in the Shenzhou 5 spacecraft. In spite of the difficulties, scientists hope to make more discoveries that will enable us 10 (survive) well into the future.
B
Billions of dollars and lots of time are spent on various space missions, whether to Mars 1 other planets much further away.
Firstly, 2 (explore) space has played an important role in the fight against world hunger. A number of the satellites record data on land and weather patterns. As 3 result, space-based science has helped in growing enough food 4 (feed) the increasing population.
Secondly, space exploration has promoted technological 5 (improve) that are beneficial to us. High-end products around the world 6 (make) to a higher standard now due to advanced technology 7 was created to meet the requirements for space exploration.
8 (final), sending astronauts into space has helped people to solve the world's problems. Seeing pictures of our planet in the universe made people realise that our planet's resources are 9 (limit). The greatest attention at present is on Mars. In the future, humans may live on both planets.
10 closing, space exploration provides many different benefits for the world.
五.书面表达(15分)
目前,城市里越来越多的人养宠物,对此《中学生英语报》组织了一场讨论:城市里是否应该饲养宠物。请你根据下表所提供的信息,介绍讨论的情况,并说明自己的观点和建议。
支持饲养宠物
反对饲养宠物
你的观点
1.安慰孤寡老人;
2.与动物和谐相处,增添生活乐趣。
1.造成环境污染;
2.吵闹扰民,甚至伤人。
……
注意:
1.词数80 左右;
2.可适当增加细节,以使行文连贯;
3.开头已为你写好,不计入总词数。
Recently we have had a heated discussion on whether people should keep pets at home in cities.
1
学科网(北京)股份有限公司
$$