It’s true that quite a few most respected scientific authorities have confirmed that the world is becoming hotter and hotter. There’s also strong evidence that humans are contributing to the warming. Countless recent reports have proved the same thing. For instance, a 2010 summary about the climate science by the Royal Society noted that: “The global warming over the last half-century has been caused mainly by human activity.”

You may not believe that humans could change the planet’s climate, but the basic science is well understood. Each year, billions of tons of greenhouse gases are released into the atmosphere because of human activity. As has been known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible(看不见的) blanket.

Of course, the earth’s climate has always been changing due to “natural” factors such as volcanic eruption(熔化) or changes in solar, or cycles concerning the Earth’s going around the sun. According to the scientific research, however, the warming observed by now matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.

Even if scientists did discover another reasonable explanation for the warming recorded so far, that would give birth to a difficult question. As Robert Henson puts it: “If some newly discovered factor is to blame for the climate change, then why aren’t carbon dioxide and the other greenhouse gases producing the warming that basic physics tells us they should be?”

The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two identical Earths – one with human influence and one without. That obviously isn’t possible, and so most scientists are careful not to state human influence as an absolute certainty.

72. In most scientists’ opinion, the global warming is mainly caused by ________.

A. solar activity B. volcanic activity

C. natural factors            D. human factors

73. The text is developed by ________.

A. giving typical examples      B. following the order of space

C. analyzing a theory and arguing it D. comparing and finding differences

74. The underline word “identical” in the last paragraph probably means ________.

A. totally different B. exactly the same

C. extremely important             D. partly independent

75. Which of the following can be the best title?

A. Are All the Scientists Really Scientific?

B. Where Is Global Warming Leading Us to?

C. Are Humans Definitely Causing Global Warming?

D. What’s Relation of Global Warming and Greenhouse Gases?

Here I’d like to talk about how to develop your curiosity and make use of it to make discoveries. Asking questions is the first step to make discoveries and find interesting answers when you are curious about something and want to know more about it.
   Firstly, write down the subject that you are interested in on a note card or piece of paper. Just put the main idea down, such as “Discover more about dinosaurs.”
   Next, think for a moment about what you already know about your subject and list information  like the sentences below:
1. Dinosaurs lived long before human beings appeared.
2. Dinosaurs lived on the earth for more than 150 million years.
3. Some dinosaurs fed on plants, some on meat.
    Thirdly, ask yourself “What can I do with what I want to learn?” On your paper, start writing down questions about the dinosaurs as you think of them:
1. What’s the best weather for dinosaurs to live in?
2. How many kinds of dinosaurs are there?
3. Have dinosaurs really disappeared?

Fourthly, armed with your list of questions, you can now visit the nearest library or turn to computer to begin your research. As you learn more about your subject, you’ll probably discover some new questions.
   For example, you might discover that dinosaurs disappeared about 65 million years ago. Why? What happened? Asking new questions can help you research your subject more deeply.
   The next time you find something interesting to research, take time to organize your thinking by asking good questions. And remember—learning more always bring more questions.
68. While doing some research, you should take the following steps__________ .
   ①list what you want to know 

②choose a research subject
   ③list what you already know 

④discover new problems
   A.①④③②      B. ①②④③     C.②③①④       D.②①④③

69. What does the underlined sentence “Armed with your list of questions” mean?
   A.Taking your list of questions with you to do more research
   B.Writing down your list of questions before turn to the computer
   C.Discussing your questions with your classmates for solution
   D.Putting your questions aside before going to the library

70. According to the passage, which of the following is TRUE?
   A. You can find all the answers online.
   B. Learn more, and you’ll have no questions.
   C. Asking questions is the only way for research

   D. During the research, more questions may arise.
71. The best title for this passage is_______________ .
   A.Discovering Dinosaurs                    B.Asking Good Questions
   C.Finding Suitable Subjects                     D.Having Interesting Answers

Can you remember what kind of sports interest you most during childhood? Looking back to years ago, you are probably find excitement and great fun in just racing around the playground or skipping rope for hours. At that time, you were thinking entertainment rather than fitness.

However, nowadays with so much high-tech home equipment and so many underused gym memberships, people seem to have forgotten the simple joy of jumping rope. Actually, restoring it will give you a total-body exercise and keep you healthy.

Jumping rope has never gained really widespread acknowledged although it’s regarded as an excellent form of exercise. There are two essential reasons for that。

For one thing, while most people recognize jumping rope as an excellent form of cardiovascular (心血管的) exercise , they also believe that it is simply too difficult to continue jumping for the near 20 minutes that it takes to achieve a beneficial physical outcome.

For another, a lot of people consider it somewhat to be boring and overly repetitive instead of enjoyable or entertaining.

In fact, jumping rope can be great fun and exciting as long as you find a proper way to practice it. For instance, you can change your pattern every 10 or 20 jumps instead of doing the usual two-foot bounce over and over again. A single bounce, a double –bounce, a skip , a knee-up , side swings , as well as a variety of other easy-to-learn free-style rope-jumping .

Now scientists’ research is discovering that jumping rope also prepares the brain for learning and memory. It is an exercise allowing both brain hemispheres(半球)to perform in parallel (平行) to each other .

Come and join us in jumping rope—a life-long activity requiring little equipment, time and space, yet leading to a much healthier life.

64. What’s the function of the first paragraph?

A. It’s used to express the author’s opinion.

B. It’s used as a conclusion of the research.

C. It’s used to lead in the topic to be discussed.

D. It’s used to give some background information.

65. It’s because      that rope jumping has not spread widely around the world.

A. it is too difficult to learn to jump

B. it is considered boring and repetitive

C. it benefits the cardiovascular system

D. it requires little equipment, time and space

66.According to the researchers , jumping rope      .

A. only prepares the brain for learning

B. is suitable for patients to recover from illness

C. is especially dangerous for small kids

D. helps both brain hemispheres work equally

67.What is the author’s attitude towards rope jumping ?

A. He is arguing against it. B. He is in favour of it .

C. He is sitting on the fence of it.        D. He is not clear about its effect.

Tired of those characterless business hotel chains? Beijing offers some special choices for you to experience luxury(奢侈) and uniqueness.

If you are fond of traditional courtyards and Chinese architecture, Anman is the perfect place to realize your fantasy. Located next to the East Gate of the Summer Palace, Anman houses a series of rooms, boasting(以拥有…而自豪) Chinese culture and royal landscapes(景观), featuring old-time attractiveness as well as modern comfort.

Anman at Summer Palace, 15 Gongmenqian Street, East gate Of Summer Palace, Haidian District; amanresorts.com; Rooms start at $550

Inspired by the style of the 1960s, Hotel G lies in Sanlitun, Beijing's fashionable entertainment district. This excellent location enables guests to explore the colorful nightlife of the capital and can choose from a number of impressive clubs and pubs. The hotel has 100 rooms in which you can enjoy luxury and modernity.

Hotel G, No A7 Gongtixilu Chaoyang District Beijing; hotel-g.com; Rooms start at 1188yuan.

DuGe Courtyard Boutique Hotel

The charm and romance of hutong have attracted so many Western tourists. Staying in a courtyard is a unique way to experience the heritage of Chinese culture. Located in a traditional hutong, DuGe Courtyard is a hidden pearl, and bridges the gap between eastern philosophy(哲学) and western concepts creating a homey atmosphere.

DuGe Courtyard Boutique Hotel, Qianyuanensi Hutong No 26, Nanluoguxiang, Dongcheng district; dugecourtyard.com; Rooms start at 1200 yuan.

Located in noising Sanlitun, the Opposite House is a relaxing place where classic meets fashion. The hotel aims to recall guests’ energy and enthusiasm after a day’s exhaustion in this fast-paced city. With its creative space design and individual service such as quality furniture and top equipment, guests are impressed by joyous comfort and contentment.

The Opposite House, The Village, Building 1 No 11 Sanlitun Road, Chaoyang District; theoppositehouse.com; Rooms start at 2250yuan.

60. Which of the following are located in Beijing's fashionable entertainment district, Sanlitun?

A. Anman at Summer Palace and Hotel G

B. The Opposite House and Hotel G

C. Anman at Summer Palace and The Opposite House

D. DuGe Courtyard Boutique Hotel and The Opposite House

61. If you want to use as little money as possible to experience luxury and uniqueness, you’d like to choose _______ to live in.

A. Anman at Summer Palace               B. Hotel G

C. DuGe Courtyard Boutique Hotel           D. The Opposite House

62. If your German friend is interested in Chinese Hutong culture and will visit Beijing next month, you’ll advise him to click _________ for further information.

A. amanresorts.com                         B. hotel-g.com

C.dugecourtyard.com                    D. theoppositehouse.com

63. The passage is most likely to appear in which section of a newspaper?

A. business       B. culture     C. opinion     D. travel

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