精英家教網 > 高中英語 > 題目詳情

Listen, Mary ______ have done it．She’s been with me at the shop all day．

A． wouldn’t B． shouldn’t

C． needn’t D． couldn’t

練習冊系列答案
相關習題

科目：高中英語 來源：2016屆湖南師范大學附屬中學高三月考三英語試卷（解析版） 題型：閱讀理解

One in five people carry a ‘smart gene’ variant(變體)linked to long lifespan, bigger forebrains and enhanced mental ability, researchers have found.

'We've known for a long time that people lose cognitive(認知) abilities as they age, but now we're beginning to understand that factors like KLOTHO can give people a boost in aging. Genetic variation in KLOTHO could help us predict brain health and find ways to protect people from the diseases that happen to us as we grow old, like Alzheimer’s disease(老年癡呆癥),” said senior author, Dena Dubal of University of California.

The KLOTHO gene affects a protein found in the kidneys and the brain that regulates many different body processes. About one in five people carry a single copy of the varian, known as KL-VS,which boosts levels of the protein and is associated with a longer lifespan and improved heart and kidney function. A small minority, 3% of the population, has two copies, which is linked to a shorter lifespan.

In the new study scientists scanned the brains of 422 men and women aged 53 and over who were also tested for the KLOTHO gene. They found that participants with a single copy of the gene variant also had a larger brain region known as RDLPFC, which is especially likely to shrink with age. Loss of neurons in this area may be one reason why older people are sometimes easily distracted and find it difficult to do more than one task at the same time.

Researcher Dr Jennifer Yokoyama said, “ The brain region enhanced by genetic variation in KLOTHO is vulnerable(脆弱的)in aging and some mental disease. In this case, bigger size means better function. It will be important to determine whether the structure increase associated with carrying one copy of KL-VS can offset the cognitive shortage caused by disease.”

People who have one copy of a variant KL-VS tend to live longer and have lower chances of suffering a stroke (中風),whereas people who have two copies may live shorter lives and have a higher risk of stroke.

1. What can we learn from the second paragraph?

A. People’s cognitive abilities do not decline if people have KLOTHO

B. With the clear understanding of KLOTHO, Alzheimer’s disease can be cured now.

C. Genetic variation in KLOTHO could be helpful in treating mental disease in elderly people

D. Genetic variation in KLOTHO could lead people to suffer from Alzheimer’s disease

2.If a person carries two copies of the gene variant, he/she may _______

A. have better kidney funtciton

B. have a shorter lifespan

C. have a higher level of the protein in his/her body

D. suffer from some cognitive disease

3.The reason why older people’s attention is easily distracted may be that _______.

A. they have fewer neurons in the RDLPEC

B. their brain region is too large

C. they have two copies of the gene variant

D. they have more neurons in the RDLPEC

4.What does the underlined word “offset” in Paragraph 5 probably mean?

A. Prevent

B. Balance

C. Keep

D. Promote

查看答案和解析>>

科目：高中英語 來源：2015-2016學年吉林長春市高二上學期期末測試英語試卷（解析版） 題型：完形填空

Tom was crossing the road the other day when he saw a red car coming in the distance．He thought the car would _____, as the lights had turned red． _____, the car was going too ____ and Tom soon _____ that it couldn’t stop in time．He _____ to move out of its _____ but it was too late．Tom was ____ down by the red car and lay _____ dead on the road． Passers-by ______ went to him and an ambulance（救護車）was _____for．The driver of the red car didn’t stop, ____one of the men had written down the _____ of the car, which he _____ to the police who arrived at the site（現(xiàn)場）．

At the same time, Tom was taken to the ____ and his parents were called for．They were very _____ to hear of the accident and quickly rushed to his ___．For three days Tom was not able to feel or think and his parents were worried that he _____ die．But on the fourth day Tom ____ and spoke softly．His parents were _____．The police by then had _____ the owner of the car and caught hold of him at last．

1.A． start B． stop C． move D． break

2.A． Unfortunately B． Obviously C． Besides D． However

3.A． fast B． slow C． far D． late

4.A． understood B． realized C． knew D． recognized

5.A． tried B． managed C． failed D． was able

6.A． road B． path C． door D． way

7.A． put B． knocked C． laid D． thrown

8.A． almost B． already C． still D． obviously

9.A． slowly B． calmly C． quickly D． carefully

10.A． looked B． called C． sent D． asked

11.A． but B． and C． or D． so

12.A． type B． name C． number D． address

13.A． took B． gave C． posted D． sent

14.A． station B． school C． hospital D． home

15.A． angry B． sad C． surprised D． disappointed

16.A． head B． side C． body D． hospital

17.A． must B． might C． could D． should

18.A． felt sick B． got up C． fell asleep D． woke up

19.A． surprised B． calm C． glad D． puzzled

20.A． noticed B． grasped C． heard D． followed

查看答案和解析>>

科目：高中英語 來源：2016年北京市西城區(qū)高三上學期期末考試英語試卷（解析版） 題型：單項填空

First _______ in 1926, the opera Turandot still attracts audience from all over the world.

A． perform B． performing

C． to perform D． performed

查看答案和解析>>

科目：高中英語 來源：2016年北京市朝陽區(qū)高三上學期期末考試英語試卷（解析版） 題型：單項填空

Don’t respond to any e-mails ______ personal information, no matter how official they look．

A． requested B． request

C． requesting D． to be requested

查看答案和解析>>

科目：高中英語 來源：2016屆江蘇省大豐市高三上學期12月月考英語試卷（解析版） 題型：單項填空

Sorry for not having got what you wanted．She kept her mouth shut and just said __________．

A． that’s her feet of clay

B． a little bird told her

C． she wanted to kill the fatted calf

D． she was the salt of the earth

查看答案和解析>>

科目：高中英語 來源：2016屆江蘇省大豐市高三上學期12月月考英語試卷（解析版） 題型：單項填空

It is announced that ______$20,000 reward will be offered for______ _return of the stolen sculpture．

A． a; the B． 不填; the

C． a; a D． 不填；a

考點：冠詞

查看答案和解析>>

科目：高中英語 來源：2014-2015學年山西忻州市高三上學期期末考試英語試卷（解析版） 題型：七選五

根據(jù)短文內容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。

No matter how old you are，your mom will always remain as one of the most important people in your life．Maybe you don't know how to express your appreciation and love to her on an ordinary day．1.Here are several things we can do this Mother's Day to show how much we appreciate and care for our mothers．

Give her flowers．2. You can show your love to your mom by giving her flowers that match her personality．Or，if you do not know your mom's favorite，carnations(康乃馨) could be your best choice．

Cook for her．Mothers usually are the ones who cook for us．Your mom will absolutely love it if you surprise her by taking over the kitchen and cooking something for her．Just make sure you clean up afterwards．

3.You can just do so describing how much your mother means to you．It can be very effective that your mom will keep them and always be reminded of how important she is to your lives as a family member．

Travel with her．Mothers work hard，so traveling can help her to relax and forget her problems．She will treasure the moment — wherever you go，just your presence．4.Take her to a spA． Massages or spas（按摩保�。� are for moms of all ages，and she will enjoy breaking the boredom of staying indoors the whole day． 5.

Mother's Day is coming．It is a time to let Mom know she's special to you．

A． Write her a letter．

B． Remember her wedding anniversary．

C． A lot of us forget that the best gift to give her is ourselves．

D． Almost every girl appreciates flowers and so does your mother．

E． She remains the center of attention and respect for a child for a long time．

F． And this will offer your mom comfort and an increased sense ofwell-being．

G． However，Mother's Day is the special time when you can let her know how important she is to you．

查看答案和解析>>

科目：高中英語 來源：2014-2015學年北京市高三上學期第一次質量檢測英語試卷（解析版） 題型：閱讀理解

Only two countries in the advanced world provide no guarantee for paid leave from work to care for a newborn child． Last spring one of the two，Australia， gave up the bad distinction by setting up paid family leave starting in 2011．I wasn’t surprised when this didn’t make the news here in the United States—we’re now the only wealthy country without such a policy．

The United States does have one explicit family policy， the Family and Medical Leave Act， passed in 1993．It entitles workers to as much as 12 weeks’ unpaid leave for care of a newborn or dealing with a family medical problem． Despite the modesty of the benefit， the Chamber of Commerce and other business groups fought it bitterly， describing it as “government-run personnel management” and a “dangerous precedent（先例）．” In fact， every step of the way， as (usually) Democratic leaders have tried to introduce work-family balance measures into the law， business groups have been strongly opposed．

As Yale law professor Anne Alstott argues， justifying parental support depends on defining （定義） the family as a social good that， in some sense， society must pay for． Parents are burdened in many ways in their lives: there is “no exit” when it comes to children． Society expects—and needs—parents to provide their children with continuity of care． And society expects—and needs—parents to persist in their roles for 18 years， or longer if needed．

1.What do we learn about paid family leave according to Paragraph 1？

A． It came as a surprise when Australia adopted the policy．

B． Setting up this policy made Australia less influential．

C． It has now become a hot topic in the United States．

D． No such policy is applied in the United States．

2.What makes it hard to take work-family balance measures in the States？

A． The incompetence of the Democrats．

B． The opposition from business circles．

C． The lack of a precedent in American history．

D． The existing Family and Medical Leave Act．

3.What is Professor Anne Alstott’s argument for parental support？

A． Children need continuous care．

B． Good parenting benefits society．

C． The cost of raising children has been growing．

D． The U．S．should keep up with other developed countries．

4.Why is the author against classifying parenting as a personal choice？

A． Parenting is regarded as a moral duty．

B． Parenting relies largely on social support．

C． Parenting produces huge moral benefits．

D． Parenting is basically a social responsibility．

查看答案和解析>>

同步練習冊答案