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More biking, better public transport and odd-even bans on vehicles (车辆单双号限行)—many cities are using different ways to reduce 【小题1】 pollution.

Paris doesn’t allow cars in many historic central places at weekends, carries out odd-even bans on vehicles, and makes public transport free 【小题2】 there are serious pollution events.

Because of the serious 【小题3】 in Delhi, India made the city stop all new large diesel cars (柴油汽车) and diesel taxis. The city has started odd-even bans on vehicles and is now encouraging Uber-style minibuses. Other 【小题4】 like Dublin and Brussels, are also considering diesel bans.

Helsinki, capital of Finland, plans to 【小题5】 cut down the number of cars on its streets by developing better public transport, raising the parking prices and encouraging bikes and walking. The government 【小题6】 that in this way, no one will want a car by 2050.

Freiburg, Germany has 500 km of bike routes (路线) and a cheap and 【小题7】 public transport system. One   town, Vauban,   does not   allow   people to   park cars near 【小题8】 homes and   makes car owners pay €18,000 for a special space near the town. In return for living without a car, the government 【小题9】 people cheaper housing, free public transport, and many bicycle spaces.

Copenhagen, Denmark prefers bikes to cars and now has 【小题10】 bicycles than people. Large parts of the city have been closed to cars for years and the city plans 【小题11】 carbon neutral (碳平衡) by 2025.

What's the coolest of transportation for middle school students back from the holidays? A racing bike? A car? No, it's a special 【小题1】 of shoes called Heelys(暴走鞋). Heelys look just like common sports shoes, but they have a wheel hidden in the heel(鞋跟). So instead of 【小题2】, kids can "fly" around. "Wearing Heelys is fun and cool," said Wu Peng, a boy who wore them on his first day back at No.6 Middle School in Beijing. Wu Peng said he loves the shoes so much that he wears them wherever he goes. Sometimes he even 【小题3】 his parents' car to the supermarket on his Heelys!

Other students think these are very cool, 【小题4】 some haven't been so lucky with their Heelys. It's reported that some children have fallen down while using these shoes, and some have been hurt. "Heelys wheels are on the heels of the shoes, so it's 【小题5】 to fall," said Liu, a doctor at the Hong Kong International Medical Clinic, Beijing. Even worse, Liu said, "Wearing Heelys for a long time could stop young people from developing their ankles and legs."

Bicycles are still very popular in Beijing. It is easy to go to school and go to work 【小题1】 (A.by B. with) bike. But now more and more people buy cars and it makes air dirty and causes air pollution. People can keep 【小题2】 (A. health   B. healthy) by riding bicycles. I prefer riding a bicycle because it is cheap and it can also keep air clean and keep me fit.