外研版(2019)必修 第三册Unit 3 The world of science Grammar 现在完成时的被动语态练习(含解析)

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名称 外研版(2019)必修 第三册Unit 3 The world of science Grammar 现在完成时的被动语态练习(含解析)
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Unit 3 The world of science
现在完成时的被动语态
一、单项选择
1.The construction of the two new railway lines ________ by now.
A.has completed B.have completed
C.have been completed D.has been completed
2.—Linda,the phone in your office can't be connected all the time. Why
—Oh,sorry,Miss Miles. The service________since last Wednesday.
A.has been stopped B.has stopped
C.was stopped D.had stopped
3.Up to now, a large number of new houses ________ for those who lost their homes in that terrible earthquake.
A.has been built B.have been built
C.is being built D.are being built
4.In the last few years thousands of cars ________ all over the world.
A.have produced B.have been produced
C.are producing D.are being produced
5.A lot of tall buildings ________ in his hometown in the last three years.
A.have set up B.have been set up
C.were set up D.are being set up
6.So far, no agreement ________ by the two sides.
A.has been reached B.was reached C.will reach D.will have reached
7.All the residents in the area ________ that they move into new flats within three months.
A.are advised B.advised C.have advised D.have been advised
8.The boys ________ many times not to swim in that lake, but it doesn't make any difference.
A.have been told B.had been told C.was told D.was being told
9.We are glad to be told that Li Tao ________ to Fudan University for his top score in the Maths Contest.
A.is admitted B.has been admitted C.was being admitted D.was admitted
10.It is said that this tradition________ for around 1,000 years.
A.is preserved B.has been preserved C.has preserved D.will be preserved
11.Up to now large quantities of money ______________ to help those suffering from the floods.
A.have collected B.has been collected C.have been collected D.will have collected
12.Delete the short message at once! Many a man ________by such tricks so far.
A.are cheated B.is cheated C.has been cheated D.have been cheated
13.The living conditions ________ by the country in the past ten years.
A.have been improved B.were improved C.are improved D.have improved
14.Great discoveries ________in space exploration since the last century.
A.was made B.made C.has made D.have been made
15.---Your suit ______! Why
---I got stuck in the rain.
A.has ruined B.had ruined C.has been ruined D.had been ruined
16.Up to now, many problems about air pollution ______ by the local government.
A.are solving B.have solved
C.are being solved D.have been solved
17.Great discoveries ______ in space exploration in the last few decades.
A.were made B.have made C.are made D.have been made
18.So far no basketball court______in our community.
A.has built B.has been built C.is building D.was built
19.All the preparations for the task ________, and we’re ready to start.
A.completed B.complete
C.had been completed D.have been completed
20.My brother wants to buy that kind of computer because he________ that it works well.
A.was told B.has told C.had been told D.has been told
二、语法填空
21.Thanks to the efforts in environmental protection, the wetland (restore) to its original appearance. (所给词的适当形式填空)
22.In the past twenty years,a huge amount of environmental damage (cause) by air pollution.
23.It is said that many a student (inform) of the message that they have been admitted to key universities. (所给词的适当形式填空)
24.Large amounts of money (collect) from all over the country in the past two weeks. (所给词的适当形式填空)
25.So far, some advanced teaching equipment, together with three hundred new books, (send) to those
schools in the faraway area.
26.Since the beginning, the television industry in the US (control) by three companies, the ABC, the CBS, and the NBC.
27.Customers are asked to make sure that they (give) the right change before leaving the checkout counter.
28.I can sing this English song because it (teach) many times on the radio.
29.The play (comment) favorably by the audience.
30.He bought a pair of trousers last week, but the trousers (wear) out by now.
31.A large amount of money (spend) in searching for a cure for this terrible disease so far.
32.The problems of the company (discuss) for nearly two hours.
33.These kinds of herbs (use) as medicine in China since the Qin Dynasty.
34.A satellite has been (launch) to learn more about space.
35.A large amount of water (waste) in the past few years.
36.All the preparations for the task (complete), and we’re ready to start.
37.Every possible means (try) to save the injured patient up to now.
38.Her novels (translate) into many foreign languages so far.
39.Zhang Zhongjing (honor) as a master doctor since the Eastern Han Dynasty.
40.In our country, large amounts of garbage (collect) and used to produce electricity in recent years.
41.It’s said that the cinema (close) for repairs for months.
42.Measures have been (take) to prevent the children from that kind of danger. (用适当的词填空)
43.Many man-made satellites (send) up into space by our country since 1949. (所给词的适当形式填空)
44.Big progress in art (make) by him in the recent years.
45.I suggest that you buy a new machine because the old one (damage) beyond repair.
46.In recent years, much research (conduct) on the wildlife protection.
47.Nearly all the countries globally (strike) by the coronavirus up to now, with over 600 million people infected worldwide.
48.Since April drinks companies (force) to pay between 18p and 24p for every litre of sugary drink they produce or import, depending on the sugar content.
49.Tom as well as two of his friends (invite) to the party so far.(所给词的适当形式填空)
50.In the past year I (inspire) to buy e-books instead of paper books.
51.Both learning sites (visit) by over 10, 000 people since last year.
52.My father (employ) at this job since 1990.
53.Many scientific discoveries (apply) to industry in the past decade.
54.My grandpa’s quality of life (improve) dramatically since the operation. (所给词的适当形式填空)
55.The operation (perform) many times in this hospital.
56.In my hometown, there is always a harvest supper for the farmers after all the wheat (cut).
57.It is reported that the murderer (arrest).(所给词的适当形式填空)
58.The museum (finish) so far, so it is still under construction. (所给词的适当形式填空)
59.Despite the previous talks, no agreement (reach) so far. (所给词的适当形式填空)
60.So far a series of problems (bring) about by this decision.
参考答案:
1.D
【详解】考查现在完成时的被动语态和主谓一致。句意:到目前为止,两条新铁路线的建设已经完成。由by now可知,句子时态是现在完成时,construction是被完成,因此空格处用现在完成时的被动语态,主语construction是不可数名词,因此空格处是has been completed,故选D。
2.A
【详解】考查现在完成时的被动语态和主谓一致。句意:—琳达,你办公室的电话总是打不通。为什么 —哦,对不起,Miles小姐。这项服务从上周三就停止了。由since可知,句子时态是现在完成时,service是被停止,因此空格处用现在完成时的被动语态,主语service是单数,因此空格处是has been stopped,故选A。
3.B
【详解】考查时态及语态。句意:到目前为止,已经为那些在那次可怕的地震中失去家园的人们建造了大量的新房屋。分析句子并根据Up to now可知,句子应使用现在完成时have done,由于主语a large number of new houses为可数名词复数,其后完成时应使用have done;此外,由于built与主语a large number of new houses之间是被动关系,应使用现在完成时的被动语态have been built。故选B项。
4.B
【详解】考查时态和语态。句意:在过去的几年里,世界上生产了成千上万辆小车。根据时间状语in the past few years可知,本句应用现在完成时,主语cars和produce之间为被动关系,应用现在完成时的被动语态,主语是复数,助动词用have。故选B。
5.B
【详解】考查时态语态。句意:过去的三年中,他的家乡建起了许多高楼大厦。根据“ in the last three years”可知,本句为现在完成时,主语A lot of tall buildings 与set up为被动关系,所以本句为现在完成时的被动语态。故选B项。
6.A
【详解】考查时态和语态。句意:到目前为止,双方还没有达成任何协议。由时间状语so far可知,句子应该用现在完成时态。又因为agreement和reach之间是被动关系,所以应该用现在完成时的被动语态。故选A。
7.D
【详解】考查时态语态。句意:这个区域的所有居民已经被建议在三个月内搬到新公寓。空处为主
句谓语动词,主语all the residents和advise之间为被动关系,且句子陈述过去动作对现在造成的影响,故应用现在完成时的被动语态,主语是复数,助动词用have。故选D。
8.A
【详解】考查时态语态。句意:这些男孩被告知多次不要去湖里游泳,可似乎没起多大作用。根据语法规则,表示从过去到现在的一段时间内反复发生的动作,应用现在完成时,结合句意可知,谓语动词与主语之间的关系为被动,所以空格处应用现在完成时的被动语态,所以应填have been told。故选A。
9.B
【详解】考查动词时态语态。句意:我们很开心得知李涛因为在数学竞赛中得了最高分被复旦大学录取了。分析句子结构以及句意可知,此处表示发生在过去的事情对现在产生影响,应用现在完成时,be admitted to...表示“被……录取”,所以应用现在完成时的被动语态。故选B。
10.B
【详解】考查时态,语态和主谓一致。句意:据说这个传统已经保存了大约1000年。由“for around 1,000 years”可知,句子用现在完成时,这个传统是被保存,因此空格处是现在完成时的被动语态,has/have been done,主语tradition是单数,因此空格处是has been preserved,故选B。
11.C
【详解】考查时态和语态。句意:到目前为止,已经筹集了大量的钱来帮助那些遭受水灾的人。根据时间状语Up to now可知,用现在完成时。主语 money为不可数名词,且与collect之间为被动关系,所以用被动语态。故选C。
12.C
【详解】考查时态、语态和主谓一致。句意:立即删除这条短消息!到目前为止,许多人都被这种把戏欺骗了。四个选项均表示“被欺骗”,A. are cheated一般现在时的被动语态,谓语动词为复数;B. is cheated一般现在时的被动语态,谓语动词为单数;C. has been cheated现在完成时的被动语态,谓语动词为单数;D. have been cheated现在完成时的被动语态,谓语动词为复数。根据本句中的“so far”可知,本句应使用现在完成时,主语为“Many a man”,谓语动词需用单数形式,即has,且主语与动词cheat之间构成被动关系,所以要用被动语态。故选C。
13.A
【详解】考查动词时态及语态。句意:在过去的十年里,生活条件得到了国家的改善。句子主语The living conditions和谓语动词improve之间是被动关系,再根据时间状语in the past ten years可知,句子用现在完成时的被动语态。故选A。
14.D
【详解】考查动词时态。句意:自上个世纪以来,太空探索取得了许多重大发现。根据时间状语since the last century可知,谓语动词应用现在完成时,表示过去开始的动作一直持续到现在,故排除AC两项;动词make和主语discoveries之间是被动关系,应用被动语态,排除C项。故选D项。
15.C
【详解】考查时态和语态。句意:——你的套装毁了!怎么啦 ——我遭雨淋了。根据语境可知,这里强调现在的结果和影响,主谓之间是被动关系,所以应该用现在完成时的被动语态。故选C。
16.D
【详解】考查动词时态语态。句意:到目前为止,当地政府已经解决了许多空气污染问题。根据句型分析可知,此空应填谓语动词,且主语many problems 和 solve为被动关系,在根据“Up to now”可知,本句应用现在完成时态。故选D项。
17.D
【详解】考查时态语态。句意:在过去的几十年里,在太空探索中有了重大的发现。由时间状语“in the last few decades”可知,空处谓语动词需用现在完成时态;动词make和主语discoveries之间是被动关系,应用被动语态。故选D。
18.B
【详解】考查时态和语态。句意:到目前为止,在我们社区没有建成篮球场。根据So far(到目前为止)可知本句是现在完成时,由于谓语动词与主语 basketball court是被动关系,因此要用现在完成时的被动语态。故选B。
19.D
【详解】考查时态和语态。句意:这项任务的所有准备工作已经完成,我们准备开始了。由下文“we’re ready to start”可知,这项任务的所有准备工作已经完成,所以我们准备开始了,此处表示“完成”这个动作从过去开始持续到现在,对现在造成了影响,所以应用现在完成时,且主语All the preparations for the task(这项任务的所有准备工作)和动词complete(完成)二者之间是被动关系,应用现在完成时的被动have/has been done,且主语是复数,complete的过去分词为completed,所以应用have been completed,故选D。
20.D
【详解】考查动词时态及语态。句意:我弟弟想买那种电脑,因为他听说那种电脑很好用。该句是复合句,含because引导的原因状语从句;从句谓语动词tell和主语he之间是被动关系,动作先于主句谓语动词,表示到现在为止已经完成的动作,所以用现在完成时的被动语态,且从句主语he
是单数第三人称,谓语动词用动词的第三人称单数形式。故选D。
21.has been restored
【详解】考查时态及语态。句意:由于在环境保护方面的努力,这片湿地已经恢复原样了。the wetland与 restore之间为被动关系,应用被动语态。再根据句意可知应用现在完成时。主语是the wetland,谓语动词用单数。根据句意,故填 has been restored adopted。
22.has been caused
【详解】考查动词时态、语态和主谓一致。句意:在过去的二十年里,空气污染造成了巨大的环境破坏。空处应填谓语动词,由时间状语In the past twenty years“在过去的几年里”可知应用现在完成时,主语为a huge amount of environmental damage 且与cause之间为被动关系,应用现在完成时的被动语态形式has been caused。故填has been caused。
23.has been informed
【详解】考查时态、语态、主谓一致。句意:据说很多学生都被告知他们已经被重点大学录取了。设空处为主语从句的谓语动词,根据同位语从句的时态,此处的动作发生在过去,并对现在有影响,应用现在完成时,inform与逻辑主语many a student为动宾关系,应用被动语态;many a student作主语,形式上为单数,但意义上为复数,意为“许多”,故助动词为has。故填has been informed。
24.have been collected
【详解】考查时态、语态及主谓一致。句意:在过去的两周里,从全国各地筹集了大量的资金。分析可知句子主语是Large amounts of money,谓语应和amounts一致用复数;根据时间状语in the past two weeks可知应用现在完成时;collect与主语之间是被动关系,需用被动语态。故填have been collected。
25.has been sent
【详解】考查动词语态。句意:到目前为止,一些先进的教学设备和300本新书已经送到了遥远地区的学校。根据可知,应用现在完成时,主语与send是逻辑动宾关系,应用被动语态,当together with连接并列主语时,谓语动词与前面的主语保持一致,即与some advanced teaching equipment一致,主语是不可数名词,助动词使用has。故填has been sent。
26.has been controlled
【详解】考查时态语态。句意:从一开始,美国的电视行业就被三家公司控制,分别是ABC、CBS和NBC。主语the television industry与谓语control构成被动关系,根据上文Since the beginning可知为现在完成时的被动语态,助动词用has。故填has been controlled。
27.have been given
【详解】考查动词语态。句意:顾客被要求在离开收银台之前确定他们找对了零钱。根据句意及所给句子可知,“give”动作在“leave”之前,应用现在完成时;主语they为动作承受者,应用被语态,主语为复数,助动词使用have。故填have been given。
28.has been taught
【详解】考查时态和语态。句意:我能唱这首英文歌,因为这首歌已经在收音机里教过很多次了。结合句意,“teach”动作在“sing”动作之前,故用现在完成时。结合原因状语从句的主语“it”为动作承受者,为单数,故谓语动词应为被动语态,主语是it ,助动词用has。故填has been taught。
29.has been commented
【详解】考查动词时态语态。句意:这出戏受到观众的好评。空处为句子谓语,陈述过去的动作对现在造成的影响,用现在完成时,主语the play是单数,谓语也用单数,主语和评论comment是被动关系,用现在完成时的被动语态。故填has been commented。
30.have worn/have been worn
【详解】考查时态、语态和主谓一致。句意:他上周买了一条裤子,但是这条裤子现在已经穿破了。wear out穿破,磨损,常用于被动语态,也可用主动表示被动,根据时间状语“by now”可知句子用现在完成时,主语trousers是名词复数,助动词用have,故填have (been) worn。
31.has been spent
【详解】考查时态和语态。句意:到目前为止,人们已经花费了大量资金来寻找治疗这种可怕疾病的方法。根据句中so far可知,句子应用现在完成时,spend与主语A large amount of money之间是被动关系,应用现在完成时的被动语态,主语A large amount of money是不可数名词,谓语动词应用第三人称单数形式has been spent。故填has been spent。
32.have been discussed
【详解】考查动词时态语态和主谓一致。句意:公司的财务问题已经讨论了近两个小时。分析句子结构,缺少谓语动词,根据时间状语“for nearly two hours”可知,此处使用现在完成时,主语“Financial problems of the company”和discuss为被动关系,需用现在完成时的被动语态,主语为复数名词,助动词使用have。故填have been discussed。
33.have been used
【详解】考查动词语态。句意:这些草药自秦朝以来就在中国被用作药物。use与主语These kinds of herbs是逻辑动宾关系,应用被动语态,根据since the Qin Dynasty可知,应用现在完成时,主语是复数,助动词使用have。故填have been used。
34.launched
【详解】考查动词。句意:为了更多地了解太空,一颗卫星已经发射。分析句子可知,设空处与前面的has been一起作谓语,此处为现在完成时的被动语态have / has been done结构,设空处应用过去分词形式。故填launched。
35.has been wasted
【详解】考查时态语态。句意:在过去的几年里,大量的水被浪费了。主语与谓语构成被动关系,结合后文in the past few years可知,应用现在完成时的被动语态,主语为A large amount of water,助动词用has。故填has been wasted。
36.have been completed
【详解】考查现在完成时的被动语态以及主谓一致。句意:这个任务的所有准备工作都已经完成了,我们准备好开始了。分析可知,所填动词为前一句的谓语动词,结合语境“we’re ready to start(我们准备好开始了)”可推知,准备工作已经完成了,因此,应是用现在完成时,强调过去的动作对现在产生的影响;且主语“preparations”和动词“complete”之间是被动关系,应是现在完成时的被动语态,主语为复数,助动词用have。故填have been completed。
37.has been tried
【详解】考查时态语态和主谓一致。句意:到目前为止,为了拯救这个受伤的病人,每一种可能的方法都被尝试了。根据时间状语up to now可知应用现在完成时,又因为Every possible means与try之间为被动关系,所以用现在完成时的被动语态。Every possible means表示“每一种可能的方法”,为单数概念,谓语用第三人称单数,故填has been tried。
38.have been translated
【详解】考查时态语态以及主谓一致。句意:到目前为止,她的小说已经被翻译成了多种外语。根据so far可知应用现在完成时,又因为novels和translate之间是被动关系,所以用现在完成时的被动语态。主语novels为复数,故填have been translated。
39.has been honored
【详解】考查现在完成时的被动语态和主谓一致。句意:自东汉以来,张仲景一直被尊为医学圣手。根据“since the Eastern Han Dynasty”可知,此处应用现在完成时。动词honor意为“给……以荣誉”,和主语构成被动关系。主语为第三人称单数。故填has been honored。
40.have been collected
【详解】考查时态语态和主谓一致。句意:在我国,近年来大量的垃圾被收集并用于发电。由时间状语in recent years可知,此处应用现在完成时;谓语动词collect与主语garbage之间为被动关系,
用被动语态,当“large amounts of+不可数名词”作主语时,谓语动词用复数形式,故填have been collected。
41.has been closed
【详解】考查时态和语态。句意:据说这家电影院已经关闭维修好几个月了。结合时间状语for months,从句主语the cinema和从句谓语动词close是被动关系,用现在完成时的被动语态,主谓一致,用助动词has。故填has been closed。
42.taken
【详解】考查动词语态。句意:已经采取措施防止儿童遭受这种危险。分析句子结构可知,此处应为“take measures to do sth.”意为“采取措施做某事”的被动语态,其中measures提前作句子主语,与take之间构成被动关系,所以使用过去分词形式。故填taken。
43.have been sent
【详解】考查时态语态。句意:自1949年以来,我国已将许多人造卫星送入太空。主语与谓语构成被动关系,且根据since 1949可知应用现在完成时的被动语态,主语为Many man-made satellites,助动词用have。故填have been sent。
44.has been made
【详解】考查时态语态。句意:近年来他在艺术方面取得了很大的进步。根据in the recent years可知,本句为现在完成时,主语A big progress 与 make为被动关系,所以本句为现在完成时的被动语态。故填has been made。
45.has been damaged
【详解】考查时态语态。句意:我建议你买台新机器,因为旧机器已经损坏得无法修理了。分析可知,所填动词作原因状语从句的谓语动词,结合前文“I suggest that you buy a new machine(我建议你买台新机器)”语境为一般现在时可推知,设空句表述原因,应使用现在完成时,强调“发生在过去的动作对现在造成的影响或者结果”。且动词“damage”与主语“the old one”之间为被动关系,用现在完成时被动语态,主语是单数,故填has been damaged。
46.has been conducted
【详解】考查动词时态语态。句意:近年来,人们对野生动物保护进行了大量的研究。分析句子可知,conduct作谓语,与主语research是被动关系,由时间状语in recent years可知用现在完成时,且主语much research是不可数名词,故填has been conducted。
47.have been stricken/have been struck
【详解】考查谓语动词。句意:到目前为止,全球几乎所有国家都受到冠状病毒的袭击,全球有超
过6亿人被感染。分析句子可知,此处应填谓语动词,根据时间状语up to now可知,此处应使用现在完成时态,与主语之间为被动关系,且主语是名词复数,strike的过去分词为stricken和struck。故填have been stricken/have been struck。
48.have been forced
【详解】考查时态和语态。句意:自4月以来,饮料公司被迫为生产或进口的每升含糖饮料支付18便士至24便士的费用,具体取决于含糖量。根据时间状语since April判断为现在完成时,且主语companies和谓语动词force之间为被动关系,应用现在完成时的被动语态,主语是复数,故填have been forced。
49.has been invited
【详解】考查动词和主谓一致。句意:到目前为止,汤姆和他的两个朋友都被邀请参加聚会了。根据时间状语so far可知,该句应为现在完成时,结合主语Tom(as well as连接的两个主语,为就远原则,为离谓语动词较远的为作为主语考虑)和动词invite为被动关系可知,此处应为现在完成时的被动语态结构。故填has been invited。
50.have been inspired
【详解】考查动词时态。句意:在过去的一年,我受启发买电子书而不是纸质书。根据时间状语in the past year可知,应用现在完成时,主语I与inspire之间为逻辑动宾关系,应用被动语态。故填have been inspired。
51.have been visited
【详解】考查动词时态、语态和主谓一致。句意:自去年以来,这两个学习网站的访问量都超过了1万人。分析句子可知,此处为谓语动词;根据时间状语“since last year”可知,应用现在完成时;由句意可知,应用被动语态;主语“Both learning sites”是复数,所以谓语动词应用复数。故填have been visited。
52.has been employed
【详解】考查时态和语态。句意:我父亲自1990年以来一直受雇于这份工作。根据时间状语since 1990可知,句子应用现在完成时,employ与主语My father之间是被动关系,应用现在完成时的被动语态,主语My father是单数,谓语动词应用第三人称单数形式。故填has been employed。
53.have been applied
【详解】考查动词。句意:在过去的十年中,许多科学发现已应用于工业。分析句子,设空处使用动词作谓语。句中in the past decade为现在完成时的时间标志,apply为动词,意为“应用,申请”,discoveries与其之间是被动关系,故使用现在完成时的被动语态。故填have been applied。
54.has been improved
【详解】考查时态语态。句意:手术后,我爷爷的生活质量有了显著的改善。主语与谓语构成被动关系,根据后文since the operation可知,应用现在完成时的被动语态,主语为My grandpa’s quality of life,助动词用has。故填has been improved。
55.has been performed
【详解】考查动词时态和主谓一致。句意:这种手术在这家医院已经做过很多次了。分析句子结构可知,本句缺少谓语动词,所以perform做本句谓语,它和主语operation之间是被动关系,应该用被动语态,再根据句意,表示“已经做过很多次了”,应该用现在完成时,主语operation为第三人称单数。故填has been performed。
56.has been cut
【详解】考查时态和语态。句意:在我的家乡,麦子割完后,农民们总会吃一顿丰收的晚餐。由句意可知,“割麦子”这一动作已经完成了且对现在造成了影响,所以要用现在完成时,wheat是不可数名词,谓语动词要用单数。all the wheat和动词cut之间是被动关系,所以要用被动语态。所以答案为has been cut。
57.has been arrested
【详解】考查动词。句意:据报道,凶手已被逮捕。分析句子,设空处使用动词作谓语,此处表示的是动作发生在过去对现在有影响,即现在完成时。arrest为动词,意为“逮捕”其与murderer之间是被动关系,故使用现在完成时被动语态,主语为 the murderer,助动词用has。故填has been arrested。
58.hasn’t been finished
【详解】考查时态语态和主谓一致。句意:博物馆到目前为止还没有完工,所以仍在建设中。结合时间状语so far,且主语The museum和谓语动词finish是被动关系,用现在完成时的被动语态,否定形式,主语The museum单数,谓语单数形式。故填hasn’t been finished。
59.has been reached
【详解】考查时态和语态。句意:尽管之前有过会谈,但到目前为止没有达成任何协议。根据时间状语so far可知,用现在完成时。主语agreement为单数形式,与reach之间为被动关系,所以用被动语态。故填has been reached。
60.has been brought
【详解】考查时态。句意:到目前为止,这个决定已经带来了一系列的问题。So far表示“到现在为
止”,常与现在完成时连用,结合语境可知,此处表示问题被带来,应用被动语态,a series of + 复数名词作主语时,其谓语动词要用单数,故填has been brought。