【主题分类】词汇理解：健康

【高级表达】

1. tap water 自来水

2. vendor n. 小贩

3. particle n. 微粒，颗粒

4. journalism n. 新闻业

5. methodology n. 方法论

【关键句型】

1. The bottle is sealed, and the label says "pure water".

  瓶子是密封的，标签上写着“纯净水”。

2. The study was conducted at the State University of New York on behalf of ….

  这项研究是…委托纽约州立大学进行的。

3. Regardless, the World Health Organization has launched a review into….

  尽管如此，世卫组织还是针对…开展了一项审查。

【答案解析】

Q26.空格处在or 之后，结构上应与前面的wandering平行，为现在分词形式；还须与后面的the ruins搭配，由此从备选项中筛选出admiring，答案为选项B

Q27.空格处在is 之后，主语为bottle，可填形容词或过去分词，表明瓶子的状态，由此从备选项中筛选出sealed，答案为选项M

Q28. 空格处在is not so之后，主语是what's inside，可填形容词或过去分词，表明里面的东西的属性，而前一句提到pure water，由此从备选项中筛选出natural，答案为选项I

Q29.空格处在作主语的名词water和作宾语的名词词组micro plastics之间，应为谓语动词，可同时与主语和宾语搭配，由此从备选项中筛选出contains，答案为选项C

Q30.空格处在副词recently和名词study之间，应为过去分词表示被动含义，意义上能与study搭配且与conclusion有关，由此从备选项中筛选出released，答案为选项K

Q31.空格处在逗号之后，应为现在分词与后面的an average of…一起构成定语，修饰前面的逻辑主语study，表明研究揭示的内容，由此从备选项中筛选出revealing，答案为选项L

Q32.空格处在冠词a和过去分词短语known as…之间，应为名词，作included的宾语，由此从备选项中筛选出substance，答案为选项O

Q33.空格处在名词containers之前，可为名词或形容词作定语修饰containers（容器），由此从备选项中筛选出liquid，答案为选项G

Q34.空格处在Confronted with this之后，应为名词，而代词this指代的是上文提到的研究结果，由此从备选项中筛选出evidence，答案为选项E

Q35.空格处在冠词the和名词词组health risks之间，应为形容词，表示风险的性质，由此从备选项中筛选出potential，答案为选项J

【主题分类】长篇阅读：行业服务

【高级表达】

1. mudslide n.泥石流

2. infrastructure n.基础设施

3. call upon 要求，号召

4. disaster-struck adj.受灾的

5. obligation n.义务

【关键句型】

1.…，couriers(邮递员)start distributing accumulated mail on the still-accessible routes.

  邮递员开始在仍能达到的路线上投递积累下来的邮件。

2. USPS urges those without standing addresses to file change-of-address forms with their new location.

  美国邮政敦促那些没有有效地址的人提交有新地址的地址更改表。

3. Mail companies are logistics(物流)companies, which puts them in a special position to help when disaster strikes.

  作为物流公司，邮政公司在灾难发生时可发挥特别的援助作用。

【答案解析】

Q36.该句提到USPS的情况，关键词组为employees' safety，据此定位到E段第四句：…， the agency's top priority is ensuring that employees are safe. 故判定答案为E

Q37.该句提到USPS的独特之处，关键词为unique，据此定位到I段：…，the agency emphasized its massive infrastructure as a "unique federal asset"和"I think we're unique as a federal agency, because we're in literally every community in this country... "故判定答案为I

Q38.该句提到自然灾害对社区的影响，关键部分为natural disasters, impact, 据此定位到C段倒数第二句：Natural disasters can wreck a community's infrastructure, disrupting systems for months or years. 故判定答案为C

Q39.该句提到邮政服务的内容，关键词为payments，据此定位到G段最后一句：According to data released in January 2017, 56 percent of bills are paid online, which means that just under half of payments still rely on delivery services to be completed.其中just under half与该句中的almost half一致，故判定答案为G

Q40.该句提到邮递员给人带来的感觉，关键词为sign和normal，据此定位到K段最后一句："When they see that carrier back out on the street,” Swigart said, "that's the first sign to them that life is starting to return to normal." 故判定答案为K

Q41.该句提到邮递服务因Hurricane Katrina而发生的变化，关键部分为Hurricane Katrina和set up，据此定位到E段倒数第二句：In response to Hurricane Katrina in 2005, USPS redirected incoming New Orleans mail to existing mail facilities in Houston.还有F段最后一句：After Hurricane Katrina hit in 2005, mail facilities were set up in dozens of locations across the country in the two weeks that USPS was unable to provide street delivery. 第二句既有Hurricane Katrina又有set up，故判定答案为F

Q42.该句提到邮政服务暂停，关键词为suspended，据此定位到B段：Even the United States Postal Service (USPS) suspended mail delivery. 故判定答案为B

Q43.该句提到私有快递公司的作用，关键词组为private postal companies, 据此定位到J段第一句：Private courier companies, which have more dollars to spend, use their expertise in logistics to help revitalize damaged areas after a disaster. 故判定答案为J

Q44.该句提到极端情况下一个邮政员工仍坚守职责的例子，关键部分为on the job carrying out duties，据此定位到D段：Days after the deadly 2017 wildfires in Santa Rosa, California, a drone (无人机)caught footage (连续 镜头)of a USPS worker, Trevor Smith, driving through burned homes in that familiar white van, collecting mail in an affected area. 故判定答案为D

Q45.该句提到邮政服务鉴别急件的问题，关键词组为priority treatment，据此定位到H段第一句：It can be hard to identify which parcels are carrying crucial items such as Social Security checks, but USPS and UPS try their best to prioritize sensitive material. 故判定答案为H

Passage 1

【主题分类】仔细阅读： 教育

【高级表达】

1. teaching assistant 助教

2. overwhelming adj. 巨大的，压倒性的

3. drop out 退出

4. remedy v. 补救

5. tell apart 区别

【关键句型】

1. When students feel isolated or confused and reach out with questions that go unanswered, their motivation to continue begins to fade.

  当学生们感到孤立或迷惑，提出的问题没人解答时，他们继续学习的动力就开始变弱。

2. The students were actually very positive about the experience.

  学生们对于这个经历实际上持肯定态度。

3.Professor Goel has a much rosier outlook on the future of artificial intelligence…

  Goel教授对于人工智能的前景有更乐观的看法…

【答案解析】

Q46.此题问关于Knowledge-Based Artificial Intelligence的情况，通过题干关键部分Knowledge-Based Artificial Intelligence定位到文章开头：… the enormous number of student questions in the online class, Knowledge-Based Artificial Intelligence。选项A）回答学生问题的机器人，B）线上学习课程，C）革命化教学的高科技手段，D）帮助学生学习的电脑程序，答案为选项B

Q47.此题问Goel教授遇到的问题，通过题干关键词problem定位到第一段最后：… but that wasn't enough to deal with the overwhelming number of daily questions from students. （但这不足以应对每天大量的学生提问）选项A）学生不满助教，B）课程太难，C）不能处理太多的学生的问题，D）太多学生退课，答案为选项C

Q48.此题问关于Jill Watson的情况，通过题干关键词Jill Watson定位到相关段落，主要信息在第三段。选项A）结果表明她很成功，B）她与学生相处得好，C）一开始不受欢迎，D）作为试验发布到网上。据该段最后一句：The students were actually very positive about the experience.（表明学生对其持肯定态度）判定答案为选项A

Q49.此题问学生对于Jill Watson的感觉，通过题干关键词Jill Watson定位到第三段，其中提到：The virtual assistant became so advanced and realistic that the students didn't know she was a computer. (虚拟助教如此高级真实，以至于学生们都不知道她是台电脑。）选项A）认为她太有人工痕迹，B）发现她不如期望的能干，C）佩服她的知识，D）不能将她与真人区分开，答案为选项D

Q50.此题问Goel教授接下来的计划，通过题干关键部分plan to do next定位到最后一段第一句：The goal of Professor Goel's virtual assistant next year is to take over answering 40% of all the questions posed by students on the online forum. (明年的目标是负责回答学生发到线上论坛的问题中的40%）选项A）启用不同线上版本，B）给她输入新问题和答案，C）帮助她回答更多的学生的问题，D）鼓励学生与她更自如地交流，答案为选项C

Passage 2

【主题分类】仔细阅读：商业运作

【高级表达】

1. crowdfunding n. 众筹

2. appeal n. 呼吁

3. gadget n. 装置

4. trait n. 特征

5. fundraising n. 筹款，集资

【关键句型】

1. Scientists have tried to tap Internet donors, too, with mixed success.

  科学家也尝试利用网络捐款人，效果不一。

2. …,but others have fallen short of reaching even modest targets.

  …,而其它的则连不大的目标都未达到。

3. Most of them engage with potential donors,….

  他们中大多数会与潜在的捐款人建立密切关系，…。

【答案解析】

Q51.此题问在网上筹款的科学家的情况，通过题干关键部分scientists trying to raise money online定位到第二段后两句：… with mixed success和…others have fallen short of reaching even modest targets (效果不一, …其它的则连不大的目标都未达到）选项A）由于目标不大，筹款不多，B）利用多种筹款策略，C）并非全部取得预期目标，D）多数将影片放到网上，答案为选项C

Q52.此题问Mike Schafer的研究目的，通过题干中的人名Mike Schafer定位到第三段开头：To determine what separates science crowdfunding triumphs from failures, … (为确定什么决定科学众筹项目的成败，…）选项A）为网页提供吸引人的内容，B）找出导致不同结果的原因，C）帮助科学家开展革新项目，D）区别科学项目与一般性项目，答案为选项B

Q53.此题问什么特质有助于众筹的成功，通过题干关键部分trait contributes to the success定位到第四段: Four traits stood out for those that achieved their goals, …（表明总共有四个特点）其中第三点为：Most of them engage with potential donors(他们中大多数会与潜在的捐款人建立密切关系）选项A）对未来人类的好处，B）与潜在捐款者的互动，C）处理财政问题的独创方式，D）项目的价值，答案为选项B

Q54.此题问研究者对筹款目标的看法，通过题干关键部分financial targets定位到第四段后半部分：And they target a small amount of money.（而且他们目标金额小）选项A）目标小便于成功，B）基于实际需要，C）谨慎评估，D）为获取注意将目标定大，答案为选项A

Q55.此题问人们捐款的动力，通过题干关键部分motivates people to donate定位到文章最后：…and people give because "they feel a connection to the person, who is doing the fundraising…（人们捐钱因为他们觉得与筹款的那个人有某种联系）选项A）容易找到网页内容，B）愿意为科学作贡献，C）项目本身的意义和影响，D）与科学家本人的联系，答案为选项D