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    US researchers have found traces of an ancient lake on Mars recently, increasing hopes of discovering evidence that billions of years ago the Red planet hosted life.
    The lake, which dates back some 3.4 billion years, appears to have covered as much as 80 square miles and was up to 1,500 feet deep, said the team from the University of Colorado.
    “This is the first clear evidence of shorelines on the surface of Mars,”said Boulder’ s research associate, Gaetano Di Achille, in a study published in the latest edition of Geophysical Research Letters.
    “The identification of the shorelines and accompanying geological evidence allows us to calculate the size and volume of the lake, which appears to have formed about 3.4 billion years ago.”
    Analysis of the images has shown the water carved out the canyon (溪谷) in which it was found, which then opened out into a valley depositing (使淤积) sediment (沉积) which formed a delta (三角洲).
    “Finding shorelines is a great discovery to us,” said assistant professor Brian Hynek, adding it showed the lake existed at a time when Mars was thought to have been cold and dry.
    Scientists believe the oldest surfaces on Mars formed during the wet and warm era known as the Noachan epoch, about 4.1 billion to 3.7 billion years ago.
    The newly discovered lake is believed to date from the Hesperian era and postdates the end of the warm and wet period on Mars by 300 million years, according to the study.
    Scientists believe deltas next to the lake may well hold secrets about past life on Mars as such places on Earth have become the natural deposits of organic carbon and other markers of life.
    小题1:The size of the lake found on Mars is ______.
    A．80 square miles B．1,500 square miles
    C．3.4 billion square milesD．300 million square miles
    小题2:When the lake existed, the weather on Mars was ____.
    A．hot and wet B．wet and warm C．cold and dryD．cold and wet
    小题3:Why do scientists think deltas near the lake may hold secrets about past life on Mars?
    A．Because similar places on Earth have become natural deposits of markers of life.
    B．Because someone has put secrets about past life on Mars there.
    C．Because past life has been found in other deltas on Mars.
    D．Because some people are said to have already seen life marks there.
    小题4:Which of the following statements is NOT true according to the passage?
    A．The Noachan epoch was a wet and warm era.
    B．The lake might have existed 3.4 billion years.
    C．The discovery can’ t fully prove that the Mars once hosted life.
    D．The lake traces prove that there exists life on Mars now.

    小题1:A
    小题1:C
    小题1:A
    小题1:D
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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

    Why should I teach my children history? That sounds like a stupid question to even ask．But, as I hear different home schooling teachers discuss history, I get the idea that there may be different reasons for teaching history．Let me briefly explain the three good reasons for studying history and two bad reasons for studying history．
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    小题1:What message can we get from the underlined sentence in Paragraph 2 ?
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    B．Many people fail to make good use of history and make the same mistakes．
    C．Many people feel it hard to understand history．
    D．Many people have no interest in studying history．
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    B．It helps us realize the importance of historical events
    C．It helps us understand why things are the way they are
    D．It helps people accept the present situation where they live
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    B．People may also learn from bad historical figures
    C．More celebrations should be held to honor their achievements
    D．Today’s people can also achieve what they achieved
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    B．Some negative reasons for studying history．
    C．How to get more people to study history．
    D．Some bad historical figures．
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    A．inspire the parents to teach their children history
    B．show the importance of history in politics
    C．explain the reasons why children study history
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    科目：高中英语 来源：不详 题型：阅读理解

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    The best coaches - and parents - encourage their kids to play fair, to have fun, and to concentrate(专心于) on helping the team while improving their own skills.
    小题1:The most important feature of good sportsmanship is ______.
    A．respecting others.B．concentrating on winning
    C．improving one’s own skills.D．beating the opposing team
    小题2:Which of the following is NOT the behavior of good sportsmanship?
    A．Shaking hands with opponentsB．Playing on the field like heroes.
    C．Praising good playing of othersD．Accepting unfriendly viewers’ opinions
    小题3: As a child with good sportsmanship, he / she will ______.
    A．treat winning as the most important thing.
    B．be proud of the success of his / her team
    C．look down on others’ playing skills.
    D．not get discouraged when defeated
    小题4:It can be inferred from the passage ______.
    A．a child who bullies others can’t play well on the field.
    B．the real winners are those who play with best skills.
    C．a child with good sportsmanship behaves well in society
    D．it is simple and easy to show one’s good sportsmanship

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    科目：高中英语 来源：不详 题型：阅读理解

    Lawmakers in the United States have expanded an investigation into the use of location-tracking systems on mobile devices． The action follows recent reports about the storing of information on the Apple iPhone． Some people consider location tracking to be a threat to personal privacy and security．
    Allan Friedman, the research director, says, “All wireless companies do some location tracking as part of their networks． This information is usually stored by the companies, not the devices, and there are laws to protect it． Law enforcement（执法） agencies, for example, have to have a fairly high standard before it can access that data． And the phone company is also prohibited from selling that information．
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    Apple says it is “not tracking the location of your iPhone”． It is simply keeping a database of Wi-Fi hotspots and cellphone towers near the user’s location． This information is meant to help the iPhone quickly find its location when needed．
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    小题1:Why did American lawmakers investigate the use of location-tracking systems on cell-phones?
    A．Because the systems can store users’ information
    B．Because many users have suffered loss after using them．
    C．Because it is thought to threaten users’ privacy．
    D．Because many reporters have shown the problem of the systems．
    小题2: Allan Friedman believes that ________．
    A．wireless companies focus on personal privacy．
    B．people are forbidden to get access to private data at will
    C．phone companies may sell private information secretly
    D．customers may ask wireless companies to locate their tracking
    小题3: What do we know from Paragraph 3?
    A． Location tracking information is stored online．
    B．Apple’s newest operating systems collect all kinds of information．
    C．Location tracking information may be uploaded to any iPhone．
    D．Apple’s newest operating systems may reveal the private information of users．
    小题4:Which of the following statements is TRUE according to the passage?
    A．Apple denies that it tracks the location of users．
    B．The researchers may misunderstand the Apple’s systems．
    C．The global positioning system is to blame for rogue applications．
    D．The iPhone can quickly find its location by using its user’s information．

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    科目：高中英语 来源：不详 题型：阅读理解

    While most high school students spend most of their time worrying about who likes who, and different relationships between their classmates, I choose to focus on my school lessons and sports.
    When I was young, my mother encouraged me to develop and keep friendship with boys in order to build strong relationships. But she told me not to risk a good friendship with a boy with the title of boyfriend. It’ s indeed a wise choice to stay friends with those of the opposite sex. In my opinion, even though some high school relationship might continue after graduation, the probability of them lasting much longer is so slim that there really is not a point to it.
    Firstly you have to think about such a question— whether it is possible to hurt both of you, or even hurt both of your future husbands or wives. My second point is that you still can date if you hope marriage could possibly follow. Except this, there really is not any other reason for dating. Some students desire relationships for a chance to be romantic. While these are nice to have, there are many more important things at this point in our lives.
    The titles of boyfriend and girlfriend put too much stress on a relationship between high school students. Just staying as common friends may be the best choice for us. I strongly recommend we should deal with it in an appropriate way and follow our teachers’ advice if necessary.
    小题1:The author writes this passage probably for        to read.
    A．high school studentsB．school teachers
    C．parents and teachersD．married couples
    小题2: Between sexes, the relationship of being good friends might be        than that of being boy/girl-friends.
    A．weakerB．saferC．slimmerD．stronger
    小题3:How does the writer like the idea of dating among the students?
    A．Dating is a nice chance for students to be romantic.
    B．Studying is far more important than dating in school.
    C．In high school dating can surely lead to future marriage.
    D．Dating in high school is sure to hurt your future family.
    小题4:The underlined word “it” in the last paragraph might refer to       .
    A．the title of boyfriend or girlfriend at school
    B．advice given by both teachers and parents
    C．the pressure from school lessons and sports
    D．the relationship between students of opposite sexes

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    科目：高中英语 来源：不详 题型：阅读理解

    Supermarkets are trying out new computers that make shopping carts more intelligent. They will help shoppers find paper cups or toilet soap, and keep a record of the bill.
    The touch-screen devices are on show at the Food Marketing Institute’s exhibition here this week, “These devices are able to create value and get you around the store quicker,” said Michael Alexander, manager of Springboard Retail Networks Inc., which makes a smart cart computer called the Concierge.
    Canadian stores will test the Concierge in July. A similar device, IBM’s “Shopping Buddy”, has recently been test-marketed at Stop & Shop stores in Massachusetts.
    Neither device tells you how many fat grams or calories are in your cart, but they will flash you with items on sale. The idea is to make it easier for people to buy, not to have second thoughts that maybe you should put something back on the shelf.
    “The whole model is driven by advertisers’ need to get in front of shoppers,” said Alexander. “They’re not watching 30-second TV ads anymore.”
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    The device also keeps a record of what you buy. When you’re finished, the device figures out your bill. Then you go to the checker or place your card into a self-checkout stand and pay.
    The new computerized shopping assistants don’t come cheap. The Buddy devices will cost the average store about $ 160, 000, and the Concierge will cost stores about $ 500 for each device.
    小题1:The underlined word “they”（paragraph 1）refers to ____________.
    A．supermarketsB．shop assistants
    C．shopping cartsD．shop managers
    小题2:We can learn from the last paragraph that ___________.
    A．intelligent shopping carts cost a large sum of money
    B．the Concierge is cheaper than the Buddy devices
    C．shop assistants with computer knowledge are well paid
    D．average stores prefer the Concierge to the Buddy devices
    小题3:What might be the most suitable title for the text?
    A．New age for supermarkets
    B．Concierge and Shopping Buddy
    C．New computers make shopping carts smarter
    D．Touch-screen devices make shopping enjoyable

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