It’s reported that Kristen Tapping who graduated from London South Bank University has invented a bike wheel that can help deal with air pollution. It’s called ROLLOE.

The wheel uses fins to draw-in air as it turns. It then uses filters (过滤器) to take in polluted air and give off clean air back into the environment. The wheel can filter more air when it goes faster.

Tapping said she was encouraged to create the wheel when she was biking around London. “On streets, you always notice the pollution: the heat, the gases and the smell,” she said. She predicted (预测) that if 10 percent of cyclists in London had a ROLLOE on their bikes, they could filter about 266,865 m³ of air a day, although this had to be tested.

A report showed that because of air pollution, London’s health costs were the highest out of the 432 European cities. The World Health Organization (WHO) has also said that outdoor air pollution caused about 4.2 million deaths around the world each year.

Tapping wants to use the wheel on shared bike projects at first, with the aim of making the wheels available for all bikes to use. She says she would also like to create a wheel available in different sizes.

3 . 书籍是人类的精神食粮，它们能滋养我们的身心，陶冶我们的情操。古今中外，不同种类的书籍都有自己的特点，总会有一本吸引你，让你爱不释手。为了引导同学们学会选择恰当的书籍，某校针对“我喜欢的书籍类型”，对300名学生进行了问卷调查，下图是相关的统计结果。

Our school did a survey among 300 students on the topic of “My Favorite Kind of Books”. Here are the results.

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Progress means the act of going forward. Making any kind of progress can make us happy.     1     The answer is by setting and actively working towards our goals.

To make more progress in life, start looking at problems in a different way. Whatever happens, think positively.     2     After we solve problems one after another, we can make more progress and become stronger.

Being confident is helpful for us to make progress. Confidence comes from proper education, training or having good relationships and so on. We should also stay with people who believe in our success and actively support us.     3    

Slow progress is still progress. Just as the old saying goes, “    4    ” Even if progress comes a lot more slowly than we expect, try not to be worried. One important thing is that we keep taking steps towards our goals, and another is that we clearly remember what our goals are all the time. The actual speed doesn't matter.

    5     Most progress often comes with setbacks along the way. Sometimes, maybe it feels like we’re taking one step forward and three steps back, but it won’t always be like that. Keep going towards our goals and we can much more easily make the progress we want.

A friend of mine and I were sitting by a window in an excellent restaurant. My friend explained to me the importance of believing good things will happen. She called this “manifesting”. There are many books on how to “manifest” success. According to these books, you need to imagine success strongly, and then you will succeed.

My friend had a wonderful job. Thanks to it, she had traveled to many interesting places and had enjoyed countless good meals. There were people with the same skills as she had, but many of them just do boring, low-paying jobs. My friend, instead, achieved these things because she in her own words had imagined that she would achieve them.

“Manifesting” can help people face difficult challenges. People who “manifest” believe that success will come to them, and this gives them the courage to move ahead. But it can also help people feel better about their lives. They expect success, and so they feel successful. This, I think, is close to the placebo (安慰剂) effect. In studies of new medicines, researchers often give some patients sugar pills and say the pills are medicine. This helps them find out how well the medicine truly works. Many people use something similar to a placebo in their daily lives. College kids often choose a special shirt or baseball cap to wear during exams. They feel it will bring them good luck. Here in China, one of the newest placebos is “Einstein’s brain”. It’s on sale on shopping sites. Customers are told that after paying a little money, they will develop a brain like that of the famous scientist. Do buyers really believe this? Of course not. But by “manifesting” a super-quick brain, they may feel relaxed and, as a result, think more clearly during exams. After studying enough, they may find this kind of trick to be a great help.

Well, “manifesting” works in some way, however, if you don’t do anything, how can you ever have any good luck simply because of “manifesting”?

Math is very useful. It can help you do many important things. Then     1     can you use math in your everyday life? Let me give you some examples. First of all, you’ll learn in math class how to calculate (计算) interest. You can use the skill to manage your money.

Geometry (几何学) and trigonometry (三角学) can help you do better     2     sports. It can help you work out the best way to hit a ball or run around a track.

Calculating areas is another important math skill. People use math skills when     3     cook. For example, you can use proportions (比例) to make the correct calculations for each ingredient. You’ll use math when you go shopping. Stores often have sales. You’ll also use math to decide which kind of soda     4     the best deal.

Some children tell me they hate math. They think math is useless and that the only reason to learn it is to pass exams. I hope they’ll learn more about how people     5     math every day. Once they see how math can be used, I think they’ll view it as important and become more interested in the subject.