1 . In general, elderly people, after retirement, can spend time in_______such as taking care of their grandchildren, traveling around, taking part in group dancing,_______, attending special classes. But after 70, when their responses start slowing and health begins declining, they have to find ways_______their remaining years in relative comfort.

The majority would prefer home-based care,_______has been the tradition in China,_______it allows them to live in a familiar environment, preferably in the company of their children and grandchildren. But the problem is that China’s_______big families with three-to-four generations living_______ one roof is fast becoming history. Usually, elderly parents and their grown-up children live in different parts of a city, even in different cities or different countries,_______it difficult or impossible for their children to take care of them.

_______the grown-up child lives only a few kilometers away in the same city, he finds it difficult to attend to his parents, as________he is the single child of the parents.

The government is encouraging home-based care for the aged not only because it is the top choice of the elderly________   because it is perhaps the only workable solution to the aging society problem. By the end of last year, China had more than 250 million people above the age of 60________about 29 million above 80, It is too large a group for any government or social organization________ .

To help the elderly people, the government is sponsoring day-care centers in local communities in many cities, where the government ________housing space and part of the funds to the centers which________by the local communities. The elderly people, after paying a lump sum(一次性付款), can enjoy meals, chat with their peers, exercise or________a nap in the daytime in these centers.

For those who prefer to stay________, information about their health and special requirements are collected by the community nursing center which, at a phone call, can________send people to their homes to help them with cooking, shopping, cleaning and dealing with any emergencies. Though this form of caring for the aged is welcome, it is________to be adopted nationwide________ some poor cities don’ t have enough resources to run such centers and services.

1.

A．celebrations

B．meetings

C．activities

D．movements

2.

A．or

B．but

C．yet

D．and

3.

A．spending

B．to spend

C．costing.

D．to cost

4.

A．which

B．that

C．it

D．where

5.

A．as

B．so

C．therefore

D．however

6.

A．optional

B．national

C．additional

D．traditional

7.

A．below

B．under

C．over

D．above

8.

A．making

B．considering

C．supposing

D．believing

9.

A．As if

B．Only if

C．Even if

D．If only

10.

A．merely

B．only

C．mostly

D．nearly

11.

A．but for

B．but also

C．and then

D．and yet

12.

A．of

B．on

C．off

D．with

13.

A．handling

B．to handle

C．handled

D．being handled

14.

A．requires

B．recommends

C．guides

D．provides

15.

A．are advised

B．is advised

C．are operated

D．is operated

16.

A．taste

B．turn

C．take

D．touch

17.

A．at home

B．at abroad

C．at dinner

D．at ease

18.

A．immediately

B．lately

C．justly

D．necessary

19.

A．but

B．yet

C．and

D．thus

20.

A．so that

B．however

C．although

D．now that

2 . Since Peter Singer published Animal Liberation in 1975, animal rights activists thought animals should be granted the same rights as humans. Referring to scientific studies showing animals_______“human characteristics”, they argue animals should be protected with the same rights. So why don’t animals have the same legal status (身份) as humans？

The line of reasoning in favor of granting animals equal rights to humans_______the fact that scientists have found characteristics in animals we normally_______with humans. A group of scientists showed monkeys demonstrate self-consciousness at the same level as humans. This has usually served as a justification for human rights, so why don’t we grant equal rights to monkeys？

The truth is,_______convincing scientific evidence, the argument for granting at least some animals the same rights as humans can’t be justified philosophically. An adequate argument for animal rights would require further philosophical inquiry and not just descriptive_______. We can feel pity for animals being treated badly and strive to protect them from such treatment. This,_______, doesn’t mean animals should enjoy the same legal status as humans.

There is a strong reason for_______that rights only apply to humans. While fundamental rights surely are valuable in their nature, they would be worthless without a system to_______them. That is why we expect other people to respect our rights.

The system that defends our rights is the fact that other people are obliged by_______in their behaviors towards us. In our daily life, we experience numerous situations in which bad guys could________from violating (侵犯) our rights. Nevertheless, we see, of course, with some exceptions, that individuals cooperate and respect other people’s rights. Rights and duties are two sides of the same coin, and one cannot________to have certain rights without having to observe the duties.

If it is my claim to live freely on my property without being bothered, my neighbor’s duty prevents him from violating my right to property and life. Suppose, however, he breaks in and damages my property. He will then be held responsible in a court of law, for he has________his duty to respect my rights. This is completely reasonable, but we will certainly face________if my property was violated by an elephant.

If we assume that animals are granted the same legal status as humans,________requires that we now drag he elephant into court. Remember, if an animal were to have such rights, it would logically also have social duties. Therefore, it is now________to the same legal procedures as humans. This raises practical questions: Who will defend the animal in court？And will the animal be able to comprehend what is going on？

1.

A．acquiring

B．desiring

C．displaying

D．respecting

2.

A．explores

B．challenge

C．overlooks

D．emphasizes

3.

A．treat

B．associate

C．deal

D．bear

4.

A．considering

B．despite

C．instead of

D．according to

5.

A．conclusions

B．performances

C．experiments

D．messages

6.

A．in return

B．for instance

C．therefore

D．however

7.

A．denying

B．maintaining

C．recognizing

D．suggesting

8.

A．approve

B．demand

C．ensure

D．reserve

9.

A．contracts

B．possession

C．faith

D．duties

10.

A．profit

B．keep

C．learn

D．result

11.

A．afford

B．claim

C．pretend

D．determine

12.

A．assigned

B．declared

C．failed

D．fulfilled

13.

A．dangers

B．questions

C．charges

D．obstacles

14.

A．agreement

B．justice

C．criticism

D．frustration

15.

A．open

B．addicted

C．subject

D．relevant

3 . 阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中选出可以填入空白处的最佳选项。

Have you seen people who take pictures of food for more than 10 minutes before eating? How about those who beautify their selfie (自拍) so much that they can’t be____? There must be one or more who ____ in your social media. No matter _____they choose to share, they share the best but the most unreal.

Take my friend Chen for example. Every time we went to a restaurant, she would not take a _____ until all the dishes we ____were on the table. Then, she would spend five minutes on______the dishes in a seemingly random but in fact ____ order. Then the most important part: taking pictures. After that, she would choose one of the ____ and click in the filter(滤镜) app. The food eventually looked 10 times more delicious than it really was, but we had no ____ to really enjoy it — it all went cold. Actually Chen's real life is much less elegant. For example, she hates to wash the dishes, so she leaves them in the sink for____.

Many people care too much about others’ opinions and try too hard to ___ others. They find it hard to be ____ and to accept themselves, and thus they are afraid to show their ____ life on social media. What they are trying to prove is____what they lack in reality. But this will not bring any_____ to reality, as they still____ the same old pattern of life.

If they really want an elegant life, they should put more____ into achieving it_____fabricating(伪造) it. Being more confident, _____themselves and trying their best to be better is much more meaningful than_____ their life on social media.

1.

A．envied

B．admired

C．defeated

D．recognized

2.

A．survive

B．exist

C．flood

D．spot

3.

A．how

B．what

C．where

D．whom

4.

A．bow

B．bite

C．breath

D．break

5.

A．offered

B．served

C．ordered

D．prepared

6.

A．cooking

B．washing

C．setting

D．collecting

7.

A．arranged

B．messy

C．casual

D．correct

8.

A．dishes

B．restaurants

C．pictures

D．tables

9.

A．choice

B．chance

C．excuse

D．reason

10.

A．months

B．years

C．weeks

D．days

11.

A．comfort

B．inspire

C．please

D．discourage

12.

A．independent

B．generous

C．responsible

D．confident

13.

A．secret

B．healthy

C．peaceful

D．real

14.

A．rarely

B．hardly

C．exactly

D．nearly

15.

A．change

B．difficulty

C．guidance

D．harm

16.

A．question

B．dislike

C．follow

D．doubt

17.

A．effort

B．ambitions

C．feelings

D．money

18.

A．other than

B．more than

C．rather than

D．less than

19.

A．identifying

B．amusing

C．persuading

D．accepting

20.

A．simplifying

B．ruining

C．beautifying

D．worsening

4 . In the U. S. there are more prisoners than farmers. In fact, the U. S. houses about one-fourth of the prison population worldwide, which amounts to ________ 2.3 million people.

Many prisons ________ punishment rather than rehabilitation (恢复正常生活), which means the prisoners may lack the skills necessary to ________ in society when they are freed. As it stands, more than 60 percent will be sent back to prison after ________ new crimes.

Today more and more prison officials are ________ the importance of rehabilitation and beginning to see the ________ of gardening in prisons. Research in California ________ suggests that, among prisoners who participated in gardening programs, less than 10 percent ________ prison.

Part of what makes planting a garden so effective is that it represents ________ Growing food from seed, many prisoners ________ experience success after a lifetime of failures, which helps to build ________. Additionally, today’s gardening programs don’t just teach prisoners gardening skills but also ________ them to take part in planning the garden and making other ________ related to the project.

And the prisoners aren’t the only ones who ________. Some prison gardens donate food to low-income areas, allowing prisoners to give back to areas where many of them were ________ Others produce so much food that they’re even ________ to donate to local nursing homes and schools.

Through programs that ________ the science of gardening, prisoners learn that knowledge is power. The ________ of ever finding a skilled job after getting out of prison, a ________ that provides enjoyment and dignity in a complex ________ world, is replaced by a greater sense of purpose.

1.

A．merely

B．hardly

C．only

D．nearly

2.

A．devote to

B．focus on

C．turn into

D．give up

3.

A．function

B．reform

C．change

D．recover

4.

A．planning

B．accusing

C．reporting

D．committing

5.

A．performing

B．recommending

C．recognizing

D．promoting

6.

A．sign

B．interest

C．aim

D．value

7.

A．prisons

B．schools

C．farms

D．towns

8.

A．escaped from

B．stayed in

C．returned to

D．went to

9.

A．reality

B．success

C．challenge

D．wisdom

10.

A．finally

B．initially

C．constantly

D．frequently

11.

A．relationship

B．self-confidence

C．reputation

D．trust

12.

A．force

B．forbid

C．allow

D．remind

13.

A．contributions

B．comments

C．discoveries

D．decisions

14.

A．assist

B．care

C．benefit

D．participate

15.

A．raised

B．grown

C．brought

D．developed

16.

A．content

B．able

C．likely

D．certain

17.

A．create

B．improve

C．assess

D．teach

18.

A．thoughtfulness

B．expectation

C．hopelessness

D．ambition

19.

A．job

B．garden

C．program

D．science

20.

A．ecological

B．technological

C．academic

D．spiritual

5 . Sports are fun, and children keep healthy while playing with others. However, sometimes playing sports can have ______ effects on children. It may produce feelings of ______ self-respect or aggressive behavior in some children. Many children say they have been ______ at or called names while playing sports. This leaves many children with a bad ______ of sports. They think sports are just too ______.

Many researchers believe adults are the ______ cause of too much aggression in children’s sports and they are to blame. They believe children watch the aggressive adult behavior and ______ it. This behavior is then further ______ from one child to another. Parents and coaches are powerful teachers because children ______ look up to them. Often these adults ______ aggressively themselves, sending children the message that ______ is everything. Many parents go to children’s sporting events and shout insults at other players or cheer when their child behaves_______. What’s worse, children are also taught that hurting other players is ______ or are pushed to continue playing even when they are injured. In addition, children watch adult sports games and see violent behavior replayed over and over on television.

_____ it comes to how to solve this problem, parents and coaches in particular should act as better ______ to children. They also need to teach children better ______ of life. They should not just ______ when children win or act aggressively. Besides, children should not be allowed to continue to play when they are _____. If adults ______ children to play when injured, this gives the message that ______ is not as important as winning.

1.

A．native

B．negative

C．active

D．instructive

2.

A．poor

B．high

C．special

D．unusual

3.

A．knocked

B．glanced

C．smiled

D．shouted

4.

A．impression

B．conclusion

C．taste

D．expectation

5.

A．curious

B．violent

C．passive

D．pleasant

6.

A．common

B．main

C．indirect

D．different

7.

A．question

B．understand

C．copy

D．ignore

8.

A．proved

B．recovered

C．spread

D．benefited

9.

A．hardly

B．seldom

C．never

D．usually

10.

A．behave

B．communicate

C．argue

D．blame

11.

A．winning

B．practicing

C．enjoyment

D．sport

12.

A．proudly

B．gently

C．aggressively

D．bravely

13.

A．acceptable

B．capable

C．possible

D．enjoyable

14.

A．While

B．Where

C．How

D．When

15.

A．guides

B．examples

C．roles

D．Partners

16.

A．methods

B．standards

C．values

D．directions

17.

A．comfort

B．cheer

C．scold

D．celebrate

18.

A．lost

B．tired

C．hated

D．injured

19.

A．force

B．order

C．forbid

D．permit

20.

A．performance

B．training

C．health

D．spirit

6 . Compared with the children of a few decades back, today’s children seem to be _________: they enjoy better health owing to recent _________in medicine and in public health care. They also enjoy all the _________of modern life. Physically and materially. Today’s children seem to be much better off than their predecessors. Nevertheless, _________the improved standards of_____________, many children nowadays seem to be emotionally _______since most parents are spending less time with their children, so little，in_______, that many could _________be called “weekend parents”. An increasing number of mothers are taking full-time jobs, _________their children in the care of baby-sitters or nurseries. Time has become a luxury few parents can ________ because of the pressures of their work and the very brisk pace of life in our________society. On the other hand, these working parents can often well afford to __________their children with the best food, clothes, toys and other____________desires. But____________to say, they fail to __________the emotional requirements of their growing children. As a noted pediatrician (儿科医生) of the Medical and Health Department __________, children need love, security, praise, recognition and responsibility. If these needs are not __________, their development might be stunted (抑制). Child psychologists all__________that some illnesses and emotional disturbances ________ to children are because of a lack of parental care. In the light of this, parents who really ________ their children should be sure that there are good lines of communication between themselves and their children, despite their heavy work loads.

1.

A．unhappier

B．naughtier

C．luckier

D．richer

2.

A．inventions

B．discoveries

C．products

D．advances

3.

A．facilities

B．comforts

C．pleasure

D．appliances

4.

A．due to

B．regarding

C．in spite of

D．for

5.

A．housing

B．caring

C．living

D．earning

6.

A．deprived

B．poor

C．faulty

D．shallow

7.

A．general

B．total

C．fact

D．truth

8.

A．wrongly

B．rightly

C．totally

D．namely

9.

A．leaving

B．entrusting

C．lending

D．making

10.

A．spend

B．afford

C．waste

D．do

11.

A．passive

B．active

C．dangerous

D．competitive

12.

A．buy

B．offer

C．provide

D．give

13.

A．emotional

B．material

C．physical

D．intellectual

14.

A．happy

B．sad

C．lucky

D．unfortunate

15.

A．show

B．feel

C．create

D．satisfy

16.

A．explains

B．talks

C．speaks

D．says

17.

A．made

B．taken

C．done

D．met

18.

A．argue

B．tell

C．admit

D．disagree

19.

A．popular

B．common

C．ordinary

D．pubic

20.

A．look after

B．bring up

C．agree with

D．care about

7 . Living aboard can help you make smarter career decisions

Living in a foreign country doesn’t just give you the opportunity to learn about different cultures, it can also boost your self-awareness and improve your career.

That’s according to a recent study ________ by the Kenan-Flagler Business School at the University of North Carolina at Chapel Hill.

A team of researchers conducted six studies involving 1,874 subjects and found that living abroad increases ________ they call “self-concept clarity.” This is defined as the extent to which a person is able to clearly and confidently define their beliefs. It has been ________ with a slew of benefits, ________ mental well-being, better stress management and enhanced job performance, the ________ write in Harvard Business Review.

In one of the studies, participants were asked to indicate how strongly they ________ statements like, “In general, I have a clear sense of who I am and what I am,” and, “It is often hard for me to make up my mind about things ________ I don’t really know what I want.”

Those who had lived abroad, the research found, reported a ________ sense of self than those who had not.

In another study, participants who had lived abroad were randomly assigned to two groups. Half were asked to reflect on the experience of living abroad while the ________ group was asked to reflect on the ________ of living in their home country. The study found that subjects who reflected on living abroad reported higher self-concept clarity than those who reflected on living ________.

Living abroad also forces people to ________ against different cultural values and norms. Repeatedly having to do this allows people to ________ which values and norms truly define who they are, the researchers explain.

Finally, the study found that the length of time lived abroad had a far greater ________ than the number of foreign countries lived in. The longer people lived abroad, the more likely they were to develop a better ________ of themselves.

As organizations become increasingly global, these findings have ________ implications in the workplace. When it comes to ________ talent, for example, recruiters（征募）highly value job candidates who have international experience because they appear more ________, outgoing and knowledgeable about global affairs, according to the Financial Times.

Further, living abroad better ________ you to make challenging career decisions, according to the researchers.

“It stands to reason,” they write, “that having a clear sense of self explains which types of career options best match one’s ________ and fulfill one’s values, thereby enabling people to be clearer and more confident about their career decisions.”

1.

A．released

B．removed

C．requested

D．replaced

2.

A．that

B．which

C．what

D．who

3.

A．familiar

B．associated

C．content

D．attached

4.

A．contained

B．included

C．including

D．holding

5.

A．researchers

B．professors

C．judges

D．participants

6.

A．turned down

B．dealt with

C．argued with

D．agreed with

7.

A．until

B．because

C．if

D．when

8.

A．calmer

B．falser

C．firmer

D．clearer

9.

A．remaining

B．remained

C．leaving

D．left

10.

A．feelings

B．belief

C．experience

D．lessons

11.

A．at school

B．at home.

C．abroad

D．outdoors

12.

A．protect

B．defend

C．go

D．struggle

13.

A．choose

B．demand

C．determine

D．define

14.

A．impact

B．effort

C．value

D．experience

15.

A．analysis

B．understanding

C．distinction

D．changing

16.

A．useless

B．free

C．practical

D．important

17.

A．finding

B．employ

C．contacting

D．apply

18.

A．modest

B．discouraged

C．puzzled

D．confident

19.

A．annoys

B．prepares

C．signs

D．forgives

20.

A．faults

B．disadvantages

C．attractions

D．strengths

8 . Four years ago in church, I saw a child of my age. His ________ was pinned on the bulletin board, his dirty clothes barely covering his small,________ body. He should not have had a ________ on his face but there he had, showing off his white teeth. I walked past his picture every day ________ him less and less. His pictures are also sent to us not to show what the child looks like but to ________ us that we are sponsoring him. We need to reflect because we are so ________ in our own misfortunes that we ________ that there are people worse off than us. Our desires are insatiable (无法满足的) and we take for granted every ________ that we are blessed with.

I looked at the child’s picture today for the first time in a ________ time His letter came every few months and I ________ them over never taking the time to ________ back. I was just too busy spending money going to movies with my friends. We can’t just help others ________ and they need our time and hands to help create a better world for everyone.

We are presented with ________ opportunities such as work and education. What we don’t realize is that the people without these ________ would pay every last cent to get the opportunities that ________ themselves to us every day. When they are ________ to us, we shouldn’t push them aside.

I honestly ________ if everyone had a chance to experience these, this world would open up a little more and provide more ________ and assistance to those who ________ it most. Anything can help those homeless in our own city but ________ with me.

1.

A．prize

B．picture

C．name

D．letter

2.

A．black

B．lovely

C．main

D．weak

3.

A．change

B．pain

C．smile

D．sign

4.

A．noticing

B．greeting

C．seeing

D．touching

5.

A．inform

B．remind

C．teach

D．warn

6.

A．absorbed

B．interested

C．expert

D．lost

7.

A．believe

B．fear

C．forget

D．doubt

8.

A．opportunity

B．possibility

C．relation

D．person

9.

A．short

B．long

C．limited

D．hard

10.

A．glanced

B．thought

C．turned

D．looked

11.

A．go

B．call

C．write

D．pay

12.

A．physically

B．financially

C．mentally

D．casually

13.

A．real

B．special

C．rare

D．many

14.

A．ways

B．plans

C．choices

D．experiences

15.

A．present

B．describe

C．introduce

D．prove

16.

A．close

B．similar

C．available

D．hopeful

17.

A．hope

B．believe

C．doubt

D．say

18.

A．attention

B．freedom

C．energy

D．power

19.

A．care

B．enjoy

C．dislike

D．need

20.

A．agrees

B．starts

C．fights

D．talks

9 . Four years ago, Chris Nagele did what many other technology CEO have done before—he moved his team into an open concept office.

His staff had been working from home, but he wanted everyone to be together. It quickly became clear, though, that Nagele had made a huge mistake. Everyone was distracted, productivity(生产率) suffered and the nine employees were unhappy, not to mention Nagele himself.

In April 2015, about three years after moving into the open office, Nagele moved the company into a 10,000-square foot office where everyone now has their own space — complete with closing doors.

Numerous companies have accepted the open office. But we’re 15% less productive, we have great trouble concentrating.

Since moving, Nagele himself has heard from others in technology who say they long for the closed office lifestyle. It’s unlikely that the open office concept will go away anytime soon, but some companies are following Nagele’s example and making a return to private spaces.

There’s one big reason we’d all love a space with four walls and a door that shuts: focus. The truth is, we can’t multitask(多任务化) and small distractions can cause us to lose focus for upwards of 20 minutes.

What’s more, certain open spaces can negatively impact our memory. We retain(保留) more information when we sit in one spot, says Sally Augustin, an environmental and design psychologist in La Grange Park, Illinois. It’s not so obvious to us each day, but we offload(卸下) memories — often little details — into our surroundings, she says.

Beside the cheaper cost, one main argument for the open workspace is that it increases teamwork. However, it’s well documented(记载) that we rarely brainstorm brilliant ideas when we’re just talk casually in a crowd.

1. How did Nagele feel three years after moving into the new office?

A．He felt satisfied with it	B．He felt doubtful about it
C．He regretted his decision	D．He was confused about it

2. What made Nagele more the company in April 2015 again?

A．The suggestions from his friends	B．The cheaper cost of the new office
C．The complaints from his employees	D．The negative results of the open office

3. What can we learn about offices from the text?

A．The majority of US companies choose open offices

B．Nagele influenced some companies to move offices

C．Many US companies are moving into private offices

D．Open offices will soon be replaced by traditional ones

4. What will happen when we work in an open office according to the text?

A．We will retain more information	B．We will become more productive
C．We will obtain more brilliant ideas	D．We will have trouble concentrating

10 . Everyone in business has been told that success is all about attracting and retaining (留住) customers. It sounds simple and achievable. But,_______, words of wisdom are soon forgotten. Once companies have attracted customers they often_______the second half of the story. In the excitement of beating off the competition, negotiating prices, securing orders, and delivering the product, managers tend to become carried away. They forget what they regard as the boring side of business—_______that the customer remains a customer._______to concentrate on retaining as well as attracting customers costs business huge amounts of money annually. It has been estimated that the average company loses between 10 and 30 per cent of its customers every years. In constantly changing_______, this is not surprising. What is surprising is the fact that few companies have any idea how many customers they have lost.

Only now are organizations beginning to wake up to those lost opportunities and calculate the_______implications. Cutting down the number of customers a company loses can make a big_______in its performance. Research in the US found that a five per cent decrease in the number of defecting (流失的) customers led to_______increases of between 25 and 85 per cent.

In the US, Domino’s Pizza estimates that a regular customer is worth more than $5,000 over ten years. A customer who receives a poor quality product or service on their first visit and_______never returns, is losing the company thousands of dollars in__________profits (more if you consider how many people they are likely to tell about their bad experience).

The logic behind cultivating customer__________is impossible to deny. “In practice most companies’ marketing effort is focused on getting customers, with little attention paid to__________them”, says Adrian Payne of Cornfield University’ School of Management. “Research suggests that there is a close relationship between retaining customers and making profits.__________customers tend to buy more, are predictable and usually cost less to service than new customers. Furthermore, they tend to be less price__________, and may provide free word-of-mouth advertising. Retaining customers also makes it__________for competitors to enter a market or increase their share of a market.

1.

A．in particular

B．in reality

C．at least

D．first of all

2.

A．emphasize

B．doubt

C．overlook

D．believe

3.

A．denying

B．ensuring

C．arguing

D．proving

4.

A．Moving

B．Hoping

C．Starting

D．Failing

5.

A．markets

B．tastes

C．prices

D．expenses

6.

A．culture

B．social

C．financial

D．economical

7.

A．promise

B．plan

C．mistake

D．difference

8.

A．cost

B．opportunity

C．profit

D．budget

9.

A．as a result

B．on the whole

C．in conclusion

D．on the contrary

10.

A．huge

B．potential

C．extra

D．reasonable

11.

A．beliefs

B．loyalty

C．habits

D．interest

12.

A．altering

B．understanding

C．keeping

D．attracting

13.

A．Assumed

B．Respected

C．Established

D．Unexpected

14.

A．agreeable

B．flexible

C．friendly

D．sensitive

15.

A．unfair

B．difficult

C．essential

D．convenient