Imagine you are taking a walk on the beautiful beach. Just then, your feet step over something and you hear a crack (噼啪声) —an empty plastic bottle. Things like this are happening more often because of sea rubbish.

    Studies show that 80%of all the waste is from the land. The waste is mainly plastics (塑料制品) which are really hard to degrade (降解). So the rubbish will remain there for a long time. Some of the pollution is caused accidentally. For example, about 10,000 product-filled boxes are lost at sea every year from business ships. Sometimes people just throw things into the water from boats or land. Many large rubbish areas are formed in the North Pacific Ocean.

    Thankfully, the situation isn't ignored (忽视). Groups like the National Oceanic and Atmospheric Association (NOAA) are taking action to help clean the sea. Since 2006, 76 projects have cleared out 3,814 metric tons (公吨) of rubbish from the sea. Methods of rubbish cleaning include using machines to remove (移除) the waste away from the surface of sea water. Besides, special nets are set by the mouths of rivers to stop the rubbish before it reaches the sea. If everyone does his part, sea rubbish seems like a problem that can be solved.

    A new rubbish sorting system (垃圾分类系统) has been put into use in Fangchengyuan Community in Beijing. Local people not only sort their rubbish, but also put QR codes (二维码) on it.

    "When the rubbish is collected and the codes are seen, I will get reward points to exchange for small gifts and even some money," one of the local people told reporters. "It's really creative and encouraging."

    This smart system has been carried out in 350 communities in Beijing. The capital of China has joined a list of cities in the country that take action to support rubbish sorting. For example, Shenzhen and Shanghai have made laws to punish people and organizations for not sorting rubbish correctly.

    China produces quite a lot of rubbish every year. Much of the rubbish is buried (填埋) in soil or burned without being sorted. Landfills (填埋场) take up a lot of land and have a risk of polluting the soil and water nearby. And burning rubbish can produce harmful gases. Through rubbish sorting, we can reduce the use of landfills and air pollution.

    What's more, rubbish sorting saves resources, which could bring economic benefits (经济利益). For example, a ton of waste paper can be reused to make about 850 kg of paper, saving 17 trees and 50 percent of water. Because of the benefits, some countries have developed successful sorting systems.

    Japan has a strict and detailed system. When people throw away a water bottle, the cap, the wrapper (包装纸) and the bottle itself have to go into three different bins. Every year, families receive special rubbish sorting timetables and directions from their local governments. They are advised to follow the timetables and directions when they throw away rubbish.

    In Australia, every family is provided with three rubbish bins—the red lid (盖子) bin for "general waste" like food and plastic bags, the yellow lid bin for "recycling" like steel and glass, and the green lid bin for "green waste" such as grass and leaves. On the streets, the bins are printed with pictures of the things that are allowed inside. It makes recycling quite easy.

Because of the , the Earth's temperature is increasing.

要求：1）文中需包含以下内容：

a. What can be seen coming out of the chimneys?

b. Is the water in the river clean?

c. Name at least two types of pollution.

d. What are the junior high students supposed to do to help stop pollution?

2）可根据图片发挥想象、适量拓展；

3）句子及篇章结构准确、连贯，书写规范；

4）文中不得出现真实姓名、校名等信息。

Pollution

Many robots can do things as humans do.

    Don't be too surprised if you see a car going down the road without a driver in Beijing these days. Last month, Baidu began to test its self-driving cars on open roads in Beijing.

    Since then, companies like Tesla, Uber and Baidu have been working to produce and test their own self—driving cars.

    Self-driving cars are safer than regular cars. They can remove the stress of driving and allow disabled or blind people to get around more easily.

    In one test, researchers pointed a laser pointer (激光棒) at the car's sensors (传感器) while it was moving. The car mistakenly thought that the laser beam was in its way and slowed down or changed the direction.

    The software that is used to direct the cars may not be safe enough. When we use our computers or smartphones, they sometimes crash (崩溃) without any reason. But if this happened to a self-driving car, the result could be deadly. Improvements to the software could be a solution to this problem.

A better town for teenagers

    I believe there are many things that we can do to make life in our town a lot better for teenagers.

    First of all, I think more bike lanes should(build). A lot of teenagers in my town ride bikes everywhere, but it's very(danger) because there is a lot of traffic. If there are more bike lanes in the future, it will be much (safe) for us.

    (two), I believe that we need more places for teenagers to go to.my opinion, teenagers won't cause problems in the street if there are more places for us to go to. So we need more(club) and other places where we can meet.

    Thirdly, teenagers here need more sports facilities. There(be) places to play ball games so far like tennis and basketball, but what about other sports,skating and rollerblading?

    Finally, I'm sure we'll make the town betterwe don't drop litter. If we all do something(help) now, our town will be much better for everyone in the future.