Although medical science    control over several dangerous diseases,what worries us is that some of them are returning.?

A.achieved      B.has achieved?    

C.will achieve    D.had achieved

 

B

 

考查動(dòng)詞的時(shí)態(tài)。本句是以一般現(xiàn)在時(shí)為基礎(chǔ),可由“worries”推出,故D項(xiàng)首先排除。由句意 “盡管醫(yī)學(xué)已經(jīng)成功控制了幾種危險(xiǎn)的疾病,但令我們擔(dān)憂的是,有些疾病正在發(fā)生反彈”可知“achieve”動(dòng)作先于“worries”動(dòng)作發(fā)生并對其造成影響,故應(yīng)采用現(xiàn)在完成時(shí)。

 

練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:英語外研必修五設(shè)計(jì) 外研版 題型:050

閱讀理解

  Although American and British English are the two major national varieties of the languages, with the largest numbers of speakers and the greatest impact(影響)worldwide, there are many other varieties of English used around the world.Today English is used as a first language, as a second language, and as a foreign language.Other important first-language varieties of English are those of Australia, Canada, Ireland, New Zealand, and South Africa.

  English is extremely important as a second language in India and has official or semi-official use in the Philippines, Malaysia, Tanzania(坦桑尼亞), Kenya(肯尼亞), Nigeria(尼日利亞), Liberia(利比里亞), and other countries in Africa, the Caribbean(加勒比地區(qū)), the Pacific, and elsewhere.It is the international language of the airlines, of computer technology, of science, and indeed of communication generally.When a Japanese business firm deals with a client(客戶)in Saudi Arabia(沙特阿拉伯), their language of communication is likely to be English.

  English has more non-native speakers than any other language, is more widely disbursed around the world, and is used for more purposes than any other language.The extraordinary spread of English is not due to any inherent virtue, but rather to the fact that by historical chance it has become the most useful language for others to learn.

  In the course of its spread, English has diversified(分化)by adapting to local circumstances and cultures, so there are different varieties of English in every country.However, because the heart of its usefulness is its ability to serve as an international medium of communication, English is likely to retain a more or less homogeneous(類似的)core-an international standard based on the usage of the United States and the United Kingdom.Yet each national variety has its own character and contribution to make to world English.

(1)

No important varieties of English are mentioned in ________ as a first language.

[  ]

A.

Africa

B.

Asia

C.

North America

D.

Oceania

(2)

What is the most likely reason for the extraordinary spread of English?

[  ]

A.

English has a long history.

B.

There are many inherent virtues in English.

C.

Britain was a very powerful country in the old days.

D.

Lots of people speaking English traveled around the world.

(3)

Which of the following statement is true?

[  ]

A.

English has the most population than any other language.

B.

The main part each variety of English plays is to serve as an international medium of communication.

C.

There is only one variety of English in one country.

D.

If a Japanese businessman doesn’t know English,he cannot do business with a client in Saudi Arabia.

查看答案和解析>>

科目:高中英語 來源:2011-2012學(xué)年河北省魏縣一中高三上學(xué)期期中考試英語卷 題型:閱讀理解

When a storm is coming, most people leave the area as quickly as possible and head for safety…But there are a few people who will get into their cars and go straight for the center of the storm.These people are willing to risk being killed by floods or 100-Kilometer- an-hour winds for the excitement of watching the storm close up.
  “Storm chasing (追逐)”is becoming an increasingly popular hobby,especially in the Midwest of the United States, where there are frequent storms between March and July.A storm chaser begins the day by checking the Internet for the latest weather reports, and then drives up to l,000 kilometers to where the storm will be and waits for it to develop.
   Although anyone can do it,storm chasing is extremely dangerous.The power of a big storm  can throw a cow into the air or destroy a whole house in seconds.Storm chasers are also often hurt in accidents caused by driving in a heavy rain.If you are a beginner, it is much safer to join a group for storm - chasing vacations during the storm season.
   Even then,storm chasing is not all adventure and excitement.“Storm chasing is 95%driving,”says Daniel Lynch,who spends most of his summer storm-chasing.“Sometimes you
Can sit around for hours waiting for something to happen,and all you get is blue sky and a few light showers.”
   However,for storm chasers,it is all worth it. “When you get close to a storm,it is the most exciting sight you will ever see in your life,”says Jasper Morley.“Every storm is an example of the power of nature.It is the greatest show on Earth.”
【小題1】For storm chasing,the first thing storm chasers do is to    .

A.head straight for the center of the storm 
B.get into the car for safety
C.wait patiently for the storm to develop
D.collect information about a coming storm
【小題2】Beginners of storm chasing are advised    
  
A.not to drive in a heavy rain B.to do it in an organized way
 
C.not to get too close to a stormD.to spend more time on it in summer
【小題3】By saying “it is all worth it” in the last paragraph,the author means that   
A.storm chasing costs a lot of money
B.storm chasing is worth hours of waiting
C.storm chasing is worth hours of waiting
D.a(chǎn) storm presents the greatest show on Earth
【小題4】What can we learn from the text?
A.Sometimes storm chasers get nothing but disappointment.
B.Many storm chasers get killed in the storms.
C.Storm chasing is becoming popular around the world.
D.Storm chasing is only fit for young people

查看答案和解析>>

科目:高中英語 來源:2012-2013學(xué)年遼寧省沈陽同澤女中高二下學(xué)期第一次月考英語試卷(帶解析) 題型:填空題

假如英語課上老師要求同桌之間交換修改作文,請你修改你同桌的以下作文。文中共有10處語言錯(cuò)誤,每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加,刪除或修改。
增加:在缺少單詞處加一個(gè)漏字符合(︿),并在其下面寫出該加的詞。
刪除:把多余的詞用斜線(\)劃掉。
修改:在錯(cuò)的詞下劃 橫線,并在該下面寫出修改后的詞。
注意:1.每處錯(cuò)誤及其修改均僅限一詞;
2.只允許修改10處,多者(從第11處起)不計(jì)分。
Last Saturday, I wanted very much to see a film together with my brother after supper. On my way to the cinema, we happen to meet an American named Peter, who had lost his way, looked worried. When he told us that he wasn't able to find the hotel, we decided take him there. When we went to the hotel, we told of Peter the great changes that had taken place in our country in the past few year, and he told us a lot of things about the youths in the U.S.A.
  Although my brother and I missed a interesting film, we felt very happily, for we had not only helped Peter out of trouble and also learnt something by him.

查看答案和解析>>

科目:高中英語 來源:2015屆山東省淄博市高二上學(xué)期期中考試英語試卷(解析版) 題型:閱讀理解

After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the previous day. The rest that you get while sleeping enables your body to prepare itself for the next day.

  There are four levels of sleep, each being a little deeper than the one before. As you sleep, your muscles relax little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts back and forth from one level of sleep to the other.

  Although your mind slows down, from time to time you will dream. Scientists who study sleep state that when dreaming occurs, your eyeballs begin to move more quickly (Although your eyelids are closed). This stage of sleep is called REM, which stands for rapid eye movement.

  If you have trouble falling asleep, some people recommend breathing very deeply. Other people believe that drinking warm milk will help make you drowsy. There is also an old suggestion the counting sheep will put you to sleep!

1.A good title for this passage is ____.

A. Sleep            B. Dreams   C. Good Health      D. Work and Rest

2.The word drowsy in the last paragraph means ____.

A. sick             B. asleep    C. stand up          D. a little sleepy

3.This passage suggests that not getting enough sleep might make you _____.

A. dream more often    B. have poor health   C. nervous     D. breathe quickly

4.During REM, ____.

A. your eyes move quickly  B. you dream C. you are restless  D. both A and B

5.The average number of hours of sleep that an adult needs is ______ .

A. approximately six hours    B. around ten hours 

C. about eight hours          D. not described here

 

查看答案和解析>>

科目:高中英語 來源:2013屆湖南省常德市高二第一次階段檢測英語題 題型:閱讀理解

 Not everyone in the world requires the same amount of living space. The amount of space a person needs around him is a cultural (文化的) difference, not an economic one. Knowing your own psychological (心理的) space needs is important because they strongly affect your choices, including, for example, the number of bedrooms in the home. If you were brought up in a two-child family and both you and your sister or brother had your own bedrooms, the chances are if you have two children or more, that you also will offer separate bedrooms for them. In America, for example, they train people to want to have their own rooms by giving them their own rooms when they are babies. This is very unusual in the world. In many other countries, the baby sleeps in the same bed with his parents or in bed near them.

   The space in the home also shows a lot about psychological space needs. Some families gather closer to each other and the size of their house has nothing to do with it. Others have separate little corners where family members go to be alone.

   Although it is true that psychological space needs are not decided by economic reasons, they sometimes have to be changed a little because of economic pressure(壓力). It is almost impossible, however, to completely change your psychological space needs.

 1.The first sentence in Paragraph 1 “Not everyone in the world requires the same amount          of space” means “______”.

   A. Not two people need exactly the same amount of living space

   B. Living space requirements are not always the same

   C. The world requires the same amount of living space

   D. Nobody needs a required amount of living space

2.Some families gather closer to each other at home than others because ______.

   A. they have limited living space   

   B. they are brought up in a large family

   C. it satisfies(滿足) their psychological space needs

   D. the children in the family sleep in the same bed with their parents

3.Which of the following is true according to the passage?

   A. Americans are trained to live in the large rooms at birth.

   B. Economic situation decides one's amount of space needs.

   C. People in different countries demand(need) different psychological space.

   D. Knowing your psychological space needs is important, as it has effect on your future.

4.The best title for this passage is ______.

   A. American Way of Living

   B. Psychological Space

   C. Space Needs in Different Countries

   D. Psychological Space and Economic Pressure

 

查看答案和解析>>

同步練習(xí)冊答案