①What does the city of the future look like? Flying cars? Robots? Or smog（烟雾）-eating buildings?

    ②Arconic, an American company, has made plans to build a 4.8-kilometer-high skyscraper（摩天大楼）. It says that the super tall building can clean not only itself but also the air around it by “eating” smog and pollutants（污染物）. But how is it done?

    ③Sherri McCleary, s scientist at Arconic, says they have introduced a new technology called EcoClean. It is a special coating that pulls pollutants out of the air. With a little help from sunlight and water vapour（水蒸气），the coating will produce atoms（原子能）called free radicals（自由基）. It is these free radicals that will take in air pollutants, break them down, and then leave the air cleaner.

④But “eating” smog and pollutants is not the only thing this skyscraper is able to do. In fact, thanks to 3D printing, the materials the building used will become even better and stronger—not only making the skyscraper look more modern, but also make it possible to stand strong winds and terrible weather.

    ⑤However, some people don't think it will work out well. Air pollution has its own character and it harms lots of cities. Does the smog-eating building have such a magical ability to stop the pollution? It seems impossible to bring the pollution under control in a short time. We should prepare ourselves for a hard fight against the pollution.

    ⑥Sounds impossible? Anyway, Arconic believes a skyscraper of this kind will be built by 2062.

    It took 13 years of international effort to map the human biological blueprint of all the genes (基因) that make us different people. The first rough draft (草图) made in 2000. The last of our 23 chromosomes (染色体) was clearly described in 2006. Ever since then, the age of personal genetic testing has been upon us. Since that time, a growing number of private companies have come on the market mostly through the Internet, offering to scan your personal DNA and compare it to some disease markets of the blueprint, called DTC genetic tests.

    But over the last five years the medical world has been discussing excitedly about whether these DTC tests are helpful or harmful, scientifically believable or completely useless. One of the usual criticisms (批评) is that the science is so new that no one really knows yet how to explain the information.

    "At present they largely remain in the period of research studies," notes Dr. Greg Ferro, special advisor to the director of genomic medicine at the US National Human Genome Research Institute. Ferro says there are two reasons." The first is that when they offer a test, are they really checking what they should check? And then the next is that even if it is believable, does what the test is checking really mean anything to your health?"

    Other worries include the privacy of the results and how your personal genetic information might be used by insurance (保险) companies to refuse your insurance or your boss to dismiss you. Or you could learn information with a huge social or personal impact (冲击), such as finding out that genetically you cannot possibly be the father of your child. It can also give you risks that may break your life, such as whether you are at high risk of cancer, Parkinson or other terrible diseases.

    Criticisms over the tests are such that some countries, such as Germany, have banned them. In 2011, some scientists advised the US government that most tests should be done under the guidance of medical professionals (专家). The UK government also expressed its worries about DTC genetic tests and in August 2010 made a set of rules to guide the development of genetic tests.

    In 2011, three medical researchers published a review article in the International Journal of Clinical Practice, saying that such tests offered more risks than benefits. The most important reason is that the tests might create worries or unreal results or drive unnecessary medical treatments. They also noted some of the genetic information the tests are based on at present is far from being perfect.

Bob likes to play sports, but he doesn't have any sports things.{#blank#}1{#/blank#} He wants to buy a basketball, a volleyball and two pairs of ping-pong bats. He goes to the sports store. The basketballs are $ 10, volleyballs are $ 9 and ping-pong bats are $ 5 for a pair.{#blank#}2{#/blank#}Then he buys a basketball, a volleyball and two pairs of ping-pong bats.{#blank#}3{#/blank#}And then he wants to buy a soccer ball.{#blank#}4{#/blank#}He thinks it's too expensive(贵的).

"I want it for $ 12. Is that OK?" says Bob to the salesman(销售员).

{#blank#}5{#/blank#} So he buys the soccer ball, too. He is very happy.

{#blank#}1{#/blank#}The last Monday in March is for students to learn it at school. It helps students learn more about what they should do to keep themselves safe. What are the accidents at school? Take a look.

Stampedes (踩踏), earthquakes and fires are the main accidents at school.

{#blank#}2{#/blank#} When students around you begin to push (推), just stand there and try to hold onto something. If you fall down in the crowd, move to one side and protect your head with your hands around.

When earthquakes happen, you can get under a desk quickly and hold on. {#blank#}3{#/blank#} If you are outdoors, find a place away from buildings, trees, and powerlines (电线).

{#blank#}4{#/blank#} It's better to put something over your mouth and nose. In this way, you won't breathe (吸) in smoke. Many people die in a fire, not because of the fire but smoke. It makes them cough and they can't breathe. That's very dangerous! {#blank#}5{#/blank#} Then you can breathe some fresh air.

注意：1.短文须包含所有信息，要求语句通顺、意思连贯、符合题意；

2.词数90左右，短文的开头已在答题卡上给出，不计入总词数；

3.短文中不得使用真实的个人及学校信息。

How to be a responsible student?

As teenagers, we are the future of our country and we need to be responsible.