2 . Is traffic a big problem where you live? Increased cycling may be the answer. Where are the best places to live and cycle? A new report lists the best bike-friendly cities around the world.

Top of the list is Amsterdam, the bike capital of the world. An incredible 40% of all traffic movements are by bicycle. There’s an extensive network of safe, fast and comfortable cycle routes. Copenhagen, the city of bikes, is a city where 32% of workers cycle to work because it’s fast and easy. Berlin is another European city that’s great for cycling. The city has about 80 kilometers of bike lanes, and 50 kilometers of pavement paths. Cycling accounts for 12% of total street traffic.

Barcelona has been praised for its cycle service “Bicing”. This was introduced in March 2007. It’s a bicycle service that allows users to take bicycles from any of the 100 stations spread around the city. Later, they can leave them at any other bike station inside the urban area of the city. The city has created a “green ring” that surrounds the city area of Barcelona with a bike path. There are 3,250 parking spaces for bikes at street level at present. Barcelona City is also building a new underground car park for bicycles.

The UK has its cycle-friendly cities too. Bristol is the birthplace of “Sustrans” —the cycle-route charity which was formed 30 years ago. One of their projects was turning an old rail line between Bristol and Bath into a bike route. Other bike-friendly cities in the UK include Cambridge and York Cambridge is an old city but has still managed to build good cycle infrastructure (基础设施), and cyclists are considered at every stage of any new developments.

Bicycle is a most popular means of transportation in China. Nowadays, riding a bicycle is also a good way to support low-carbon living. Beijing can be one of the best bike-friendly cities in China. There are many riding routes in Beijing for outdoor-lovers to explore. Cyclists can get close enough to experience the history and culture of Beijing, including the Forbidden City, Drum Tower, the Water Cube, the Bird’s Nest, Hutong etc.

In the early 1800s, Stanislas Baudry built public baths in the center of a town in France. To encourage people to come, Baudry drove a large vehicle around to give people a ride to the baths. He called the vehicle an omnibus,     1     is a Latin word meaning “for everyone”. Then he     2     (notice) that many passengers would get off at stops during the journey to the baths. So Baudry shifted the focus of his omnibus service. He created a permanent route for passengers     3     (board) and get off. Eventually, the omnibus became known     4     (simple) as a bus.

5 . Electric Cars

Where do cars get their energy from? For most cars, the answer is petrol. But some cars use electricity. These cars have special motors that get their power from large batteries.

Most people tend to think of electric cars as a new invention, but they have been around for a long time. They were popular when the technology for petrol engines was not very advanced. Recently, electric cars have again become popular because people want cars that pollute less.

Electric cars are better than petrol cars in several ways. The biggest benefit is reduced pollution. In areas where there is a high percentage of electric cars, there is less pollution. But it is important to understand that electric cars still cause pollution. Remember that the electricity to power electric cars has to come from somewhere, which is most likely a power station. Unless these power stations run on solar or wind energy, they are most likely burning coal and oil to make electricity. The second benefit of electric cars is a reduction in the dependence on foreign oil.

There are several countries, including the United States, which don't want to rely on oil coming from other countries to power their transportation systems. They want the power to come from within their country, and since electric cars can run on electricity from coal or nuclear power stations, there is less of a need to import oil.

Despite the benefits of electric cars, there are some problems with them as well. One disadvantage is that electric cars are more expensive than petrol cars. This is mostly due to the high cost of the batteries these cars need. Electric cars run on batteries, just like a mobile phone does. But unlike a mobile phone, you cannot charge your electric car's battery by plugging it into a wall. They need to be charged in special places. Now, there is a lack of places where people can charge the batteries. Another problem is that electric cars cannot travel as far as petrol cars. Some people are afraid that the battery will run out of electricity (and the car will stop) before they reach their destination.

Despite these problems, many people, including automobile industry experts, believe that the percentage of electric cars will increase in the future.

Is traffic a big problem where you live? Increased cycling may be the answer. Where are the best places to live and cycle? A new report lists the best bike—friendly cities around the world.

Top of the list is Amsterdam, the bike capital of the world. An incredible 40% of all traffic movements are by bicycle. There’s an extensive network of safe, fast and comfortable cycle routes. Copenhagen, the city of bikes, is a city where 32% of workers cycle to work because it’s fast and easy. Berlin is another European city that’s great for cycling. The city has about 80 kilometres of bike lanes, and 50kilometres of pavement paths. Cycling accounts for 12% of total street traffic.

Barcelona has been praised for its cycle service “Bicing”. It’s a bicycle service that allows users to take bicycles from any of the 100 stations spread around the city. Later, they can leave them at any other bike station inside the urban area of the city. The city has created a “green ring” that surrounds the city area with a bike path. There are 3,250 parking spaces for bikes at street level at present. Barcelona City is also building a new underground car park for bicycles.

The UK has its cycle friendly cities too. Bristol is the birthplace of “Sustrans” the cycle-route charity which was formed 30 years ago. One of their projects was turning an old rail line between Bristol and Bath into a bike route. Other bike friendly cities in the UK include Cambridge and York. Cambridge is an old city but has still managed to build good cycle infrastructure (基础设施), and cyclists are considered at every stage of any new developments.

Bicycle is a most popular means of transportation in China. Nowadays, riding a bicycle is also a good way to support low-carbon living. Beijing can be one of the best bike-friendly cities in China. There are many riding routes in Beijing for outdoor-lovers to explore. Cyclists can get close enough to experience the history and culture of Beijing, including the Forbidden City, Drum Tower, the Water Cube etc.

9 . If you’re a cycling lover, you will have to pay a lot of attention to your bicycle and maintain it well, for bicycle parts are exposed to wear and tear (磨损) over time and you have to examine the bicycle to see if there are any signs of wearing such as scratches, dents (凹陷) etc. Sometimes, a part may not work because it has exceeded its life expectancy. Sometimes, you will need to find replacement parts for it to keep up the performance of the bicycle.

Different parts of a bicycle will wear at different rates so it is very important that you have a basic understanding about the role played by each part. One of the most important parts of the bicycle is the frame. You will need to choose a frame that lasts for a very long time. Of course, you will see some paint scratches after some time. When you’re selecting a frame, you have to think about the material. Aluminium (铝) frames will not rust easily, but they have a higher chance to dent. Steel frames will be hard to dent, but you will need to make sure they get a good paint job so that they won’t rust.

Wheels also experience a lot of wear and tear and you should go for a professional seller when you want to buy wheels. There are different types of wheels that you can buy, like Zipp wheels that provide more aerodynamic efficiency (空气动力学效能). Investing in new tyres instead of going for used is a good idea because you will be able to get more use out of it. The same goes for chain as there’s a higher chance of a used chain breaking. You may also experience shifting problems. However, some parts of bicycles such as pedals can be used for a long time and you can find different styles.

Other parts that you can buy used are seats, handlebars and the stem. When you are buying handlebars, you have to see if there are any dents or if they have been bent out of shape. There shouldn’t be any cracks in the seat post or the handlebars. There are many shops where you can buy parts, so you will have to check the references to see how customers respond to them before you buy anything.

10 . Wilbur and Orille Wright are brothers famous for inventing the first aeroplane. Their interest in flight     1     (start) on the day when their father brought home a toy helicopter for them. It was made of paper and wood. The boys played with it until it broke, and then made their own     2     (replace) it. When they were older, they owned a bicycle shop where they started producing and selling their own bikes. This provided them with the money to pay for their experiments in flight. Eventually, they built their     3     (fly) machine.