birds use their feathers for flight.some of their feathers are for other purposes．( )A．OnceB．IfC．AlthoughD．Because 题目和参考答案——青夏教育精英家教网—

题目内容

17．______ birds use their feathers for flight，some of their feathers are for other purposes．（　　）

A．

Once

B．

C．

Although

D．

Because

分析虽然鸟类用羽毛飞行，但它们的一些羽毛是为了其他用途．

解答答案C．
once"一旦"，引导条件状语从句．if"如果"，引导条件状语从句．although"尽管，虽然"，引导让步状语从句．because"因为"，引导原因状语从句．分析可知前后两句话之间是逻辑上的"让步"关系，再结合句子所表达的意思可知答案选C．

点评本题考查从属连词的用法．连词的用法辨析，要注意分析主从句之间的逻辑关系，再确定相应的连词，同时注意不同的连词的语义及用法区别．

练习册系列答案

8．Americans waste energy every year，from electronics using too much power，uneaten foods and many other preventable causes．（16）F And it will make you feel good to know you are helping to make the earth a better place for the future．
In the Kitchen
You can easily save energy in the kitchen by changing the way you use appliance．First，the dishwashers．Forget the"Dry Cycle"．Open the dishwasher door and allow dishes to air dry．（17）D
In the Bathroom
You may love your hot shower，but it is no good for the environment．Try taking baths instead of showers to conserve（节省） water．Turn off the tap while you are brushing the teeth，washing your face，or shaving in order to keep from wasting the water．（18）G
In the Garden
Green living has no better place than in a green garden．Instead of wasting your lawn with water you pay for，buy a rain barrel to gather the natural falling rain water．（19）B Composting （堆肥） will break down leftover vegetables and paper products and turn them into a usable，rich soil （土壤）．The soil will come in handy when you start growing your own vegetables．
At the Office
Green living does not have to stop when you go to work．Change your usual work routine by walking，riding your bike or taking public transportation to the workplace．（20）E Save paper by printing on both sides of each page．
A．A vegetable garden saves your money．
B．You can also save money by building a compost area．
C．Transporting vegetables to the local grocery store requires much gas．
D．In the same way，open the door to your oven to allow heat to warm the room．
E．While at work，cut down waste by bringing your own cup for coffee or water．
F．Starting green living techniques into your home will help the environment．
G．If you are decorate your bathroom，set up a special flush toilet to conserve water when flushing．

5．Modern zoos are different from those built fifty years ago．Those zoos were places where people could go to see animals from many parts of the world．The animals lived in cages with iron bars．Although the zoo keepers took good care of them，many of the animals did not feel comfortable，and they often felt ill．
In modern zoos，people can see animals in more natural conditions．The animals are given more freedom in nature．Even the appearance of zoos has changed．Trees and grass grow in cages，and water flows through the places the animal live in．There are few bars； instead，there is often a deep ditch，filled with water，which surrounds a space where several sorts of animals live together as they world naturally．In an American zoo，the visitor can walk through a huge special cage that is filled with trees，some small animals and many birds，and large enough for birds to live naturally．In a zoo in New York，with the use of special light，people can observe certain animals that are active only at night，when most zoos are closed．Some zoos have special places for visitors to watch animals that live in the desert or under water．
Modern zoos not only show animals to visitors，but also keep and save rare animals．For this reason，fifty years from now，the grandchildren of today's visitors will still be able to enjoy watching these animals

32．It seems thatD is something most important for animals．
A．eating good food B．living in cages
C．living with other animals D．living in natural conditions
33．In modern zoosC．
A．different kinds of animals are kept separately
B．animals are no longer taken good care of
C．animals have more freedom
D．visitors can walk where they live
34．In some zoos people canB．
A．walk through huge special cages to watch all sots of animals
B．see animals which live in special conditions
C．during the day observe animals that are active at night
D．watch all rare animals that may not be seen in the future
35．The main idea of the passage is thatA．
A．zoos are now places where animals can live naturally
B．zoos are places where people can see animals from all over the world
C．there should be old and modern zoos alike
D．rare animals may soon die out．

12．根据短文内容，从短文后的选项中选出能填入空白处的最佳选项．选项中有两项为多余选项．
      If anyone had told me three years ago that I would be spending most of my weekends camping．I would have laughed heartily．Campers，in my eyes，were people who enjoyed insects bites，ill-cooked meals，and uncomfortable sleeping bags．They had nothing in common with me．（36）D．
      The friends who introduced me to camping thought that it meant to be a pioneer．（37）C We sleep in a tent，cooked over an open fire，and walked a long distance to take the shower and use the bathroom．This brief visit with Mother Nature cost me two days off from work，recovering from a bad case of sunburn and the doctor′s bill for my son′s food poisoning．
      I was，nevertheless，talked into going on another fun-filled holiday in the wilderness．（38）A Instead，we had a pop-up camper with comfortable beds and an air conditioner．My nature-loving friends had remembered to bring all the necessities of life．
     （39）F We have done a lot of it since．Recently，we bought a twenty-eight-foot travel trailer complete with a bathroom and a built-in TV set．There is a separate bedroom，a modern kitchen with a refrigerator．The trailer even has matching carpet and curtains．
      （40）E It must be true that sooner or later，everyone finds his or her way back to nature．I recommend that you find your way in style．

A．This time there was no tent．
B．Things are going to be improved．
C．The trip they took me on was a rough one．
D．I was to learn a lot about camping since then，however．
E．I must say that I have certainly come to enjoy camping．
F．After the trip，my family became quite interested in camping．
G．There was no shade as the trees were no more than 3 feet tall．

2．Measles（麻疹），which once killed 450 children each year and disabled even more，was nearly wiped out in the United States 14 years ago by the universal use of the MMR vaccine（疫苗）．But the disease is making a comeback，caused by a growing anti-vaccine movement and misinformation that is spreading quickly．Already this year，115 measles cases have been reported in the USA，compared with 189 for all of last year．
     The numbers might sound small，but they are the leading edge of a dangerous trend．When vaccination rates are very high，as they still are in the nation as a whole，everyone is protected．This is called"herd immunity"，which protects the people who get hurt easily，including those who can't be vaccinated for medical reasons，babies too young to get vaccinated and people on whom the vaccine doesn't work．
     But herd immunity works only when nearly the whole herd joins in．When some refuse vaccination and seek a free ride，immunity breaks down and everyone is in even bigger danger．
     That's exactly what is happening in small neighborhoods around the country from Orange County，California，where 22 measles cases were reported this month，to Brooklyn，N．Y．，where a 17-year-old caused an outbreak last year．
     The resistance to vaccine has continued for decades，and it is driven by a real but very small risk．Those who refuse to take that risk selfishly make others suffer．
     Making things worse are state laws that make it too easy to opt out（决定不参加） of what are supposed to be required vaccines for all children entering kindergarten．Seventeen states allow parents to get an exemption（豁免），sometimes just by signing a paper saying they personally object to a vaccine．
     Now，several states are moving to tighten laws by adding new regulations for opting out．But no one does enough to limit exemptions．
     Parents ought to be able to opt out only for limited medical or religious reasons．But personal opinions？Not good enough．Everyone enjoys the life-saving benefits vaccines provide，but they'll exist only as long as everyone shares in the risks．

63．The first two paragraphs suggest thatA．
A．a small number of measles cases can start a dangerous trend
B．the outbreak of measles attracts the public attention
C．anti-vaccine movement has its medical reasons
D．information about measles spreads quickly
64．Herd immunity works well whenC．
A．exemptions are allowed
B．several vaccines are used together
C．the whole neighborhood is involved in
D．new regulations are added to the state laws
65．What is the main reason for the comeback of measles？D
A．The overuse of vaccine．
B．The lack of medical care．
C．The features of measles itself．
D．The vaccine opt-outs of some people．
66．What is the purpose of the passage？C
A．To introduce the idea of exemption．
B．To discuss methods to cure measles．
C．To stress the importance of vaccination．
D．To appeal for equal rights in medical treatment．

9．Fifteen years ago，I took a summer vacation in Lecce in southern Italy．After climbing up a hill for a panoramic（全景的） view of the blue sea，white buildings and green olive trees，I paused to catch my breath and then positioned myself to take the best photo of this panorama．
Unfortunately，just as I took out my camera，a woman approached from behind，and planted herself right in front of my view．Like me，this woman was here to stop，sigh and appreciate the view．
Patient as I was，after about 15 minutes，my camera scanning the sun and reviewing the shot I would eventually take，I grew frustrated．Was it too much to ask her to move so I could take just one picture of the landscape？Sure，I could have asked her，but something prevented me from doing so．She seemed so content in her observation．I didn't want to mess with that．
Another 15 minutes passed and I grew bored．The woman was still there．I decided to take the photo anyway．And now when I look at it，I think her presence in the photo is what makes the image interesting．The landscape，beautiful on its own，somehow comes to life and breathes because this woman is engaging with it．
This photo，with the unique beauty that unfolded before me and that woman who"ruined"it，now hangs on a wall in my bedroom．What would she think if she knew that her figure is captured（捕捉） and frozen on some stranger's bedroom wall？A bedroom，after all，is a very private space，in which some woman I don't even know has been immortalized（使…永存）．In some ways，she lives in my house．
Perhaps we all live in each others'spaces．Perhaps this is what photos are for：to remind us that we all appreciate beauty，that we all share a common desire for pleasure，for connection，for something that is greater than us．
That photo is a reminder，a captured moment，an unspoken conversation between two women，separated only by a thin square of glass．

41．What happened when the author was about to take a photo？B
A．Her camera stopped working．
B．A woman blocked her view．
C．Someone asked her to leave．
D．A friend approached from behind．
42．According to the author，the woman was probablyA．
A．enjoying herself
B．losing her patience
C．waiting for the sunset
D．thinking about her past
43．In the author's opinion，what makes the photo so alive？C
A．The rich color of the landscape．
B．The perfect positioning of the camera．
C．The woman's existence in the photo．
D．The soft sunlight that summer day．
44．The photo on the bedroom wall enables the author to better understandD．
A．the need to be close to nature
B．the importance of private space
C．the joy of the vacation in Italy
D．the shared passion for beauty
45．The passage can be seen as the author's reflections uponA．
A．a particular life experience
B．the pleasure of traveling
C．the art of photography
D．a lost friendship．

6．Last October，while tending her garden in Mora，Sweden，Lena Pahlsson pulled out a handful of small （56）carrots（carrot） and was about to throw them away．But something made her look closer，and she noticed a（57）shiny/shining（shine） object．Yes，there beneath the leafy top of one tiny carrot was her long-lost wedding ring．
Pahlsson screamed（58）soloudly that her daughter came running from the house．"she thought I had hurt（59）myself（I），"says Pahlsson．
Sixteen years（60）earlier（early），Pahlsson had removed the diamond ring（61）to cook（cook）a meal．When she wanted to put the ring back on later，it was gone．She suspected that one of her three daughters-then ten，eight，and six-had picked it up，but the girls said they hadn't．Pahlsson and her husband（62）searched（search） the kitchen，checking every corner，but turned up nothing．"I gave up hope of finding my ring again，"she says．She never replaced it．
Pahlsson and her husband now think the ring probably got（63）swept（sweep） into a pile of kitchen rubbish and was spread over the garden，（64）whereit remained until the carrot's leafy top accidentally sprouted （生长） through it．For Pahlsson，its return was（65）awonder．

4．Something terriblemusthavehappenedif Li Chang was not coming to eat in his restaurant as he always did．
要是李昌不像往常那样到他店里吃饭，那问题一定严重了．

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