At the shopping mall, you probably think about spending, not saving. Think about all the lights that keep the mall bright. Think about all the water faucets in the toilet. Think about all the air conditioning in summer. Saving energy is a hot topic for such a big place!
　　Many things at the mall use energy. Electric lights, infrared faucets and air-conditioners need electricity to work. One way to save energy is by keeping lights clean. More and more dust and dirt make the lights less bright. When  malls keep lights clean, they can use fewer lights and keep the area just as bright ,Using fewer lights means using less energy.
You step up to the  water faucet. The water starts to flow. You don't have to touch a thing. Why do malls have such fancy faucets?. The answer is simple. They save water. Sometimes people forget to turn the water off after they wash. Infrared faucets turn themselves off.
The…
【小题1】________is a hot topic for a big mall.

The bicycle is really and important means of transportation in China.Bicyclese have become more and more popular in China.People ride bikes to their workplaces,to shopping centers,to schools,and so on.During the rush hour,you can often see a boiling sea of bicycles running in all directions.With the largest number of bike riders in the world,China is often referred to as the kingdom of bicycles.There are many advantages(优点) about the bicycle.For example,bicycles do not cause air or sound pollution(污染);compared with cars,bicycle cause no environmental(环境的) problems;bicycles save energy(能源) and parking place;riding bikes to travel can be a wonderful experience(经历);the bicycle allows us to go anywhere nearby easily;bikes are not very expensive,and almost every family can afford them;riding bikes regularly does good to people's health.

　　通读短文，然后根据短文内容回答问题。

1.Why is China called the kingdom of bicycles?

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2.Can we go anywhere easily by bicycles?

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3.Why can almost every family afford bicycles?

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4.What do you think the most popular means of transportation in China is?

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5.What are the advantages of the bicycles?You can give one or two examples.

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The bicycle is one of the simplest yet most useful inventions in the world. What is most surprising is that it was not ___1__ earlier, although the great inventor Leonardo Da Vinci had drawn pictures for bicycles and also for flying machines and some other things. Those things were not produced___2___ long after he died.
　　A person riding a bicycle uses ___3___ energy to make the bicycle move, and there is no pollution at all when you are riding. Even so, in developed ____4___, most people don’t travel to work by bicycle. It is not because the bicycles are expensive or people feel___5____ if they ride to work. It’s because __6___ cars on the roads becomes larger. It certainly becomes ___7___ to ride a bicycle. As a result, more people put their bicycles away and go to work ___8___ their cars , and in this way, the situation is made more serious.___9___ the best way to make riding safer and more popular is to create paths (开设通道) only for bicycles, and to make ___10___ so difficult and expensive for drivers to take their cars into the city that they will go back to use their bicycles.