Unit 4 Sharing
Ⅰ.单项填空
1．Mark______have hurried.After driving at top speed，he arrived half an hour early.
A．needn’t B．wouldn’t
C．mustn’t
D．couldn’t
解析 考查情态动词。句意：马克本没有必要那么急，全速开车后他提前了半个小时到达。根据句意和前后的照应可知应选A项。A项表示“本没有必要”；B项意为“不会”；C项表示“不允许”；D项表示“不可能”。显然，B、C、D三项与后文论述不符。
答案 A
2．If most breadwinners______a day’s pay to the Hope Project，then it will be hopeful.
A．gift
B．donate
C．present
D．give
解析 句意：如果大多数挣工资的人把一天的所得捐献给希望工程的话，那希望工程就有希望了。donate“捐献”；present“(作为礼物)赠送”；give“给予”；gift为名词“礼物”。
答案 B
3．They______two free tickets to Canada，otherwise they’d never have been able to afford to go.
A．had got
B．got
C．have got
D．get
解析 句意：他们得到两张免费去加拿大的机票，不然他们没钱去那儿。otherwise是虚拟语气的暗示，从“they’d never have been able to...”可知，该句是对已发生的事件的虚拟假设，而前半句是对过去事实的陈述，故B项正确。
答案 B
4．Ronny’s steps______，and there was a moment of absolute silence.
A．died back
B．died away
C．died off
D．died out
解析 考查短语的意思。die away意思为“(风、声音)渐息，渐弱”；die off意为“相继死亡，种群突然急剧的衰减”；die out意为“完全的灭亡，灭绝”，如：Tribes and tribal customs died out centuries ago.部落和部落文化在几个世纪前就消亡了。
答案 B
5．The criminal，as well as some______people，was arrested by the police yesterday.
A．relevant
B．skilled
C．released
D．lucky
解析 relevant相关的。句意：那个罪犯，连同一些相关的人昨天被警方逮捕了。
答案 A
6．The doctor said that the patient had______at once.
A．to operate
B．to be operated
C．operated
D．to be operated on
解析 operate作“动手术”讲时，是不及物动词，所以表示“给某人动手术”用短语operate on sb.，用被动语态时介词on应该保留。
答案 D
7．The secretary should have all the______documents ready before the meeting begins.
A．concerning
B．respecting
C．relevant
D．regarding
解析 relevant“有关的”。句意：秘书应该在会议开始之前把所有相关文件准备好。
答案 C
8．When will the result of the exam be announced？The students are______to know it.
A．agreeing
B．dying
C．deciding
D．desiring
解析 be dying to do sth.极想做某事。desire意为“渴望；渴求”后可接动词不定式，但不用于进行时。
答案 B
9．What skills are needed to______this machine?
A．manage
B．operate
C．operate on
D．manage with
解析 operate a machine操作机器。
答案 B
10．Something is wrong with his camera.It can’t be______to take photos in cloudy conditions.
A．adapted
B．adjusted
C．adopted
D．remedied
解析 adapt使适应；adjust调节，调整，在此表示调节照相机的速度、距离或光圈等；adopt采取、采用；remedy纠正。
答案 B
11．Ladies and gentlemen，I have the great privilege______introducing our speaker for tonight.
A．in B．of
C．about D．on
解析 have the privilege of doing很荣幸地做某事。句意：女士们、先生们，我很荣幸地向大家介绍今晚的发言人。
答案 B
12．My family were moving to the countryside and I had to make some______and learn to lead a different life there.
A．allowance
B．accommodation
C．adjustment
D．assessment
解析 考查名词词义辨析。adjustment表示“调整以适应”。A项allowance“津贴，限额”；B项accommodation“住所；工作场所”；D项assessment“评价；估计”。
答案 C
13．Everyone in the class is expected to ______ these discussions.
A．participate
B．participate in
C．take part
D．join
解析 考查动词(词组)辨析。participate为不及物动词，若跟宾语，则需要加介词in。此处participate in＝take part in＝join in。
答案 B
14．All of them thought it necessary that he______the meeting.
A．attend
B．join
C．participate in
D．take part in
解析 attend a meeting“参加(出席)会议”。
答案 A
15．“It’s not only you but also Lucy who ______，”said Mr.Black after knowing what had happened.
A．are to blamed
B．is to blamed
C．are to blame
D．is to blame
解析 “not only...but also”连接两个并列的主语时，谓语动词的形式要遵循“就近原则”，也就是说由“Lucy”决定；be to blame“应(为……)承担责任”，故选D项。
答案 D
Ⅱ.阅读理解
A
For many people，volunteering is a way of life.Holidays are the time of the year that more people are in a giving mood.Homeless shelters，children’s hospitals，and nursing homes are excellent places to give of one’s time.
Volunteering in Homeless Shelters
There is a homeless directory online that anyone can easily access to find the closest homeless shelter to their home.According to the homeless shelter directory，currently there are 3,233 shelters in the US，so it is not difficult to find a shelter.Helping to serve food，picking up donations of food，preparing meals，and cleaning up are things that one can do to help at a homeless shelter.
Volunteering in Children’s Hospitals
Every child needs comfort and joy，especially during the holiday seasons.By visiting sick children in hospitals，an individual provides helping hands by supplementing the services usually done by the hospital staff.Personalizing the hospital experience adds to the comfort and happiness of the children and their families.Volunteers provide help，and positive interactions (相互交流) which enhance the patient’s quality of care.Help is needed almost everywhere in a hospital；from the lobby，parking lot，cafeteria，to admitting，helping with the gift cart，and even reading to children in the waiting rooms or their hospital rooms.
Volunteering in Nursing Homes
According to the National Center for Health Statistics，“Over 50% of those living in nursing homes do not have close relatives and 46% have no living children.”
Life in a nursing home is lonely，confusing，and frightening for many residents.Volunteering at a nursing home is a great opportunity to make a difference in someone else’s life.Playing cards，sitting with and talking to a resident，taking a walk，or sharing a meal makes a huge difference，especially when they have no other sole on earth to visit them.
The three examples above are only a small fraction of institutions in which volunteers are needed.Giving of oneself，especially during the holidays blesses and cheers others.
语篇解读 本文介绍了人们在假期中可以选择去做志愿活动的三个地方。
1．According to the passage，what can a volunteer do in nursing homes?
A．Visiting the sick children.
B．Picking up the donated food.
C．Helping with the gift cart.
D．Playing cards with a lonely old man.
解析 细节理解题。根据文中Volunteering in Nursing Homes部分的描述可知D项正确。A、C项是在children’s hospitals可以做的事，B项是在homeless shelters可以做的事。
答案 D
2．What can we learn about the volunteering?
A．You can only volunteer during the holidays.
B．You can help prepare meals in a nursing home.
C．It is easy to find a homeless shelter to volunteer.
D．Help is needed everywhere in a homeless shelter.
解析 细节理解题。根据文中的“There is a homeless directory online that anyone can easily access to find the closest homeless shelter to their home.”可知，人们很容易找到一个能在里面做志愿活动的流浪者之家。其他三项都是与文章内容不符。
答案 C
3．In a children’s hospital，which of the following is true?
A．Over 50% of those living there do not have relatives.
B．A personal visit brings happiness to a sick boy.
C．Children live a lonely and frightening life.
D．Children love listening to volunteers’ reading.
解析 细节理解题。根据文中Volunteering in Children’s Hospitals部分的描述可知B项正确，A、C两项错误，D项文中未提及。
答案 B
4．The best title for the passage would be________.
A．Giving of oneself cheers others
B．Volunteering is a way of life
C．Volunteering during the holidays
D．Giving is better than taking
解析 主旨大意题。全文主要介绍了假期中人们可以选择去做志愿活动的三个地方。故C项作为本文的标题最佳。
答案 C
B
Wisdom teeth are normally the last teeth to appear.This usually happens when people are in their late teen years or early twenties，in other words，when they are older and wiser.
Wisdom teeth can grow into place normally and never cause a problem.But often there is not enough room for them in the mouth；they might crowd other teeth.Sometimes they even push sideways through the gums (齿龈)．
An impacted wisdom tooth is one that fails to completely rise through the gums.Wisdom teeth that only partly break through can leave space for bacteria to enter around the teeth.Infection (感染) is a risk in these cases.
Wisdom teeth that are not well lined and become impacted are often removed.The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums.Removal is also advised if there is a chance that wisdom teeth ate poorly lined.The best time to remove is before the teeth cause any problems or pain.Young adults are the best candidates for wisdom teeth removal.
But why do we have wisdom teeth if we often need to get them removed？One theory has to do with our diets.Scientists say the diet of ancient humans probably required more chewing teeth.Life was probably a little rougher on the teeth back then，too.So it was good to have extras.
【语篇解读 本文是一篇说明文。文章介绍了智慧之牙——智齿。
5．According to the passage，which of the following statements is NOT true?
A．Just older and wiser people can have wisdom teeth.
B．Wisdom teeth can cause problems if not in their right place.
C．Impacted wisdom teeth can’t grow out of the gum fully.
D．Wisdom teeth that only partly break can get bacterial infections.
解析 细节理解题。根据文章第一段可知，所谓的智齿是指在青少年晚期或二十岁出头长出的牙齿，而不是只有老人或智者才有的牙齿。
答案 A
6．Wisdom teeth should be removed________.
A．when they break through the gums
B．when they are below the gums
C．if they are not well lined or get impacted
D．if they take up enough room in the mouth
解析 细节理解题。根据文章第四段第一句“Wisdom teeth that are not well lined and become impacted are often removed.”可知，C项正确。
答案 C
7．We can learn from the passage that________.
A．impacted wisdom teeth have the risk of getting infected
B．ancient humans need chewing teeth because of their happy life
C．older adults are the best candidates for wisdom teeth removal
D．more chewing teeth are needed for the diet of modern humans
解析 推理判断题。根据文章第三段可知，阻生智齿(即impacted wisdom teeth)会在牙齿周围给细菌留出进入的空间，这就有被感染的风除。故选A。根据第四段最后一句可排除C项；根据最后一段可排除B、D两项。
答案 A
8．The main purpose of the passage is to________.
A．advise
B．persuade
C．comment
D．introduce
解析 写作意图题。本文是一篇说明文。文章主要介绍了长智齿的大约时间、智齿可能导致的问题、拔掉智齿的时间、为什么长智齿等内容。所以本文写作的主要目的就是介绍。
答案 D