题目内容

12．Encourage your children to try new things，but try not to      them too hard．（　　）
A．drawB．strikeC．rushD．push

分析 鼓励您的孩子尝试新事物，但不要太过逼迫他们．

解答 答案：D
A：draw拉，拖；B：strike敲打，罢工；C：rush冲，突袭；D：push对…施加压力，逼迫 根据题干中"encourage your children to try new things"鼓励孩子尝试新事物，下一句"but try not to"表转折，可推断出尽管要鼓励孩子，但不要逼迫他们，故D选项正确．

点评 本题考查动词的词义辨析，根据对动词词义的理解并结合句意，可选出正确选项．

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2．Scientists investigated why Ebola virus is so deadly when it spreads from animals to humans and then from human-to-human contact．The research team looked at the Zaire Ebola virus in an animal system to understand how it gains strength．This virus is responsible for the current outbreak in West Africa．They found that initially the animal systems were not affected by the virus，but succeeding transmission（传送） into other animals caused the virus to"hot up"and become more severe．
The team analyzed the viruses at different stages and were able to identify several changes in its genetic material that were associated with increased disease．
Professor Julian Hiscox，who led the study from the University's Institute of Infection and Global Health，explains："The work tells us that the evolutionary goal of Ebola virus is to become more fatal．"
"We were able to show through genetic analysis which parts of the virus are involved in this process．The information we have gathered will now allow us to monitor for such changes in an outbreak as well as develop future treatment strategies．"
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"Our understanding of Ebola virus biology is way behind that of other viruses and our cooperation shows how we can bring together our specialists'skills to close this knowledge gap．"
Professor Miles Carroll，a co-author of the work，said："This study has allowed the team to be at the forefront of developing methodologies to analyze patient samples recently taken by the European Mobile Laboratory from West Africa to understand disease evolution during the current outbreak．"
29．What does the first paragraph mainly tell us？C
A．How severe Ebola virus is．
B．How Ebola virus spreads．
C．How Ebola virus gradually becomes deadly．
D．What contributions scientists have made on Ebola virus．
30．Which of the following statements is mentioned in the passage？B
A．In the first stage，the virus hurts its victims much．
B．As the virus spreads，it'll change and become more and more deadly．
C．The research in Ebola virus is more advanced than that in other viruses．
D．The scientists have a negative attitude to the research in Ebola virus．
31．The underlined word"fatal"has the closest meaning toB．
A．optimistic   B．deadly    C．common   D．fantastic
32．Where can we probably read this passage？A
A．In a science report．
B．In a storybook．
C．In an advertisement．
D．In a textbook．
3．In the Central Valley of California，farmers are reducing crop size because they do not have enough water．Last year，California had the least amount of rain since officials began keeping records．And it may be just as bad this year．
    Reservoirs are areas where water is stored．In California，some reservoirs are empty．The amount of snow in the Sierra Mountains is 75 percent below normal．This mountain snow melts in the spring and fills rivers．The water is used by farmers．But now，farmers are warning of the possibility of another"Dust Bowl，"like the one of the l930s．Severe droughts and dust storms covered American farmlands and few crops grew．
    Dan Errotabere is a third generation California farmer．He grows tomatoes，walnuts，garlic  and other crops in Fresno County．He says the federal agency that controls the amount of water released from dams and rivers has stopped giving him water．He and other farmers say officials are not correctly administering the water system．"The last couple of years-dry years，along with severe environmental restrictions--has now presented us with a zero allocation year，''said he．
    Farmers may not be able to plant crops on more than 200，000 hectares of farmland in the Central Valley this spring．Mr．Errotabere will plant crops on just 80 percent of his farmland．He has enough work for only l5 of his 25 workers．
    Federal and state officials sometimes reduce the amount of water to farmers even in years with normal rainfall levels．The officials must supply water to the Sacramento River Delta which is home to several endangered species．
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51．The farmers in California grow fewer crops due toA．
A．water shortage          B．water pollution
C．government policy       D．species protection
52．There is no water in some reservoirs becauseD．
A．snow didn't melt in time    
B．dust storms covered them
C．water supply was cut off   
D．the snowfall dropped sharply
53．What do we know about Dan Errotabere？A
A．He isn't content with the officials in charge of water system．
B．He can do nothing but ask for help from the government．
C．He has to employ more workers to work for him．
D．He plans to cut down the majority of his crops．
54．The underlined word"it''in the last paragraph refers toB．
A．salt    B．seawater    C．waste water   D．desalinization
55．What's the main idea of the text？C
A．Annual rainfall in California decreases．
B．Water use in California is not reasonable．
C．Lack of water affects Californian crops．
D．Action is taken to rid drought in California．
20．The team is hoping to     last year's success but，of course，it depends on what kind of weather they'll get．（　　）
A．confirmB．equalC．continueD．guarantee
7．Going green is something that affects every single one of us．Whether by recycling those plastic water bottles，or by cutting down on electricity in your home，the importance of going green on a personal level is extremely important．But，when you're a millionaire NBA basketball star，how do you help out the environment？
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The Philadelphia Eagles，a professional American football team，are really doing their part to give back to the community．The Eagles Go Green page has a"Green Energy Calculator"and according to the web site fans have saved 73，674.90 a year and saved 666，320 pounds of CO2 per year．Also，the Eagles have set up a"Stop global warming virtual march（虚拟游行）on Washington"，a march across America for one year，through the Internet with a goal to bring fans together and to urge leaders to deal with the serious problem of global warming now．
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A．help the Houston Rockets win the NBA championship
B．ask the United Nations to protect sharks in China
C．encourage young people to care about the environment
D．train more young people to become players of NBA
32．What have the Philadelphia Eagles done to help out the environment？A
A．They have called on fans to do things to reduce global warming．
B．They have marched on Washington to bring fans together．
C．They have saved 73，674.90 for solving global warming．
D．They have reduced CO2 emission by 666，320 pounds per year．
33．Which of the following statements is TRUE according to the last two paragraphsD？
A．Bob Burnquist created Earth Day．
B．Bob Burnquist eats only organic foods．
C．Kelly Slater donated a lot of money．
D．Kelly Slater held a competition．
34．The best title for the passage would probably beB．
A．Highly Competitive Athletes
B．Environment-friendly Athletes
C．World-famous Athletes
D．Millionaire Athletes
35．What can we learn from the passage？C
A．Only famous people need to care about environmental problems．
B．America is the country that takes best care of environment．
C．Environmental problems have a common effect on everyone of us．
D．Yao Ming's goals to raise people's awareness of environment are mainly about climate change and air pollution．
17．_______ different life today is from what it was fifty years ago!（　　）
A．WhatB．What aC．HowD．How a
4．It has been proved_____eating vegetables in childhood helps to protect you against serious illnesses in later life．（　　）
A．ifB．becauseC．whenD．that
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A．Signals of air pollution
B．Safety limits of air pollution
C．Air pollution，cancer risk
D．Air pollution，smog risk
60．What's the main task of IARC？B
A．To focus on cancer-causing substances．
B．To evaluate the air quality．
C．To study the developing risk of cancer．
D．To send signals to the international community．
61．Why should the international community take action without further delay？D
A．The composition and levels of air pollution vary from place to place．
B．More and more people in developing countries are exposed to air pollution．
C．Developed countries face air pollution，the level of which is higher than the safety limits．
D．A large number of people worldwide are exposed to air pollution．
16．Why are people interested in eating raw foods or whole foods？One reason is that eating these types of food reduces the risk of acid accumulation in your body．
Raw and whole foods are usually digested more efficiently than cooked and refined foods．When we cook foods，we destroy the natural enzymes（酶）that are part of the food in its raw form．These enzymes were intended by nature to help us digest the food．When we consume food without these natural enzymes，our bodies either digest the food improperly or allow too many nutrients to be absorbed into the bloodstream．In both instances，the result is obesity．When too many nutrients are absorbed at once，the body grows fat．Improperly digested food moves slowly through the digestive tract，where it becomes increasingly acidic （酸性的）．To protect its vital organs from this acidic waste，the body changes the acid into fat and stores it safely away from the organs．
Processed foods contain chemical elements，which might confuse the appetite mechanism that tells us when we've had enough to eat； as a result，people often overeat．Processed foods also upset the digestive cycle．The body will either identify these foods as allergens and then store them safely away from the organs as fat，or the remains of undigested food will become acidic and enter the bloodstream as acid waste，which will stick to the blood vessel walls and block the passage of vital oxygen and nutrients heading for the body's cells．The body's metabolism（新陈代谢） becomes inactive，and the result is weight gain and obesity．
The accumulation of acid in the digestive tract makes digestion increasingly inefficient．When that happens，even healthy foods can become acidic and the food allergies will become more common．
To stop this vicious（恶性的） circle in its tracks，people need to consume food and supplements that will neutralize （使…中和）the acid already accumulated in body．Eating the right types of raw and whole foods can help．It's also important to restore your enzyme balance．You need to identify and avoid the foods that cause acid accumulation and consume the foods that increase enzyme production．If you truly want to change and help your body heal itself，you need to take an active approach．-Raw and whole foods can be your choice．

31．What is the main purpose of this passage？A
A．To advocate eating more raw and whole foods．
B．To tell the differences between raw and processed foods．
C．To inform people of the harm of processed foods．
D．To warn people of the problem of obesity．
32．It can be inferred from Para.2thatB．
A．it is essential for people to protect their vital organs
B．foods with natural enzymes help people keep fit
C．we'd better be cautious about raw and whole foods
D．giving up cooked and refined foods is a new lifestyle
33．Processed foods are unhealthy because theyC．
A．destroy body's cells
B．are difficult to digest
C．may lead to obesity
D．stop body's metabolism
34．What is likely to be talked about following the last paragraph？D
A．Active approaches to avoid acid．
B．Different causes of acid accumulation．
C．Correct ways to cook raw foods．
D．Suitable types of raw and whole foods．
35．What can we learn from the text？B
A．Processed foods are good for our appetite mechanism．
B．Eating the right types of raw and whole foods does good to our body．
C．The accumulation of acid in the digestive tract makes digestion more effective．
D．Processed foods also comfort the digestive tract．

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