B

    We can get the weather report on the Internet. We can also know it by watching TV or listening to the radio. But how can we know it without TVs, radios or the Internet? Now let me tell you some other ways.

    One way is to study the clouds. In fact, the higher the clouds are, the better the weather will be; the lower the clouds are, the worse the weather will be. If the thick and fluffy(轻软状的) clouds get bigger early in the day, then it will rain. If a sudden, cool and dark thunder­cloud appears, then a storm is about to come.

    Colours in the sky tell us about the weather, too. A golden ring around the moon warns us that a storm is on the way.

The rainbow has a message, too. If the sun is in the west and the rainbow is in the east, the rain will be moving away from you.

    When you go out for a business trip or weekend, you have to 1 pack your mobile phone, laptop(手提电脑), MP3 player, camera and so on. It's wonderful for you to 2 no batteries, no chargers(充电器) and no wires.

    This is the future “wireless power”. That is 3 of passing on electricity through the air to laptops and other small electrical devices (装置) without the need of wires.  These new devices were4 the first trade products in Las Vegas at the International Consumer Electronics Show, the world's biggest trade 5 for small electrical devices.

    Experts believe this is just the 6. In a world without wires, you can use a laptop in cafes or airports 7 you put an “electricity hotspot” inside and no longer have to search for a charger form your bags. It is said that you will be able to 8 your devices in the room that has wireless power, and then they will get the power 9. If one room has wireless power, you would know that once you walk through the front door, your mobile phone starts charging up, even when it is still in your bag or pocket. You'd never need to 10 the right charger again.

    This kind of technology, named Power Bean, can turn electricity into a laser(激光), then pass it on as heat, across the room.

    There was a small village near the mountain. There were a lot of trees in the mountain. People in the 1always got something from the mountain, such as animals and trees. When they wanted to 2a house, they cut down the trees. And they also killed the animals for 3. Trees were very 4in their daily life. They made tables, chairs 5beds by cutting down the trees. In addition, when they 6meals, they still used some trees for wood. However, they only cut down trees but 7planted new trees. So the trees were fewer and fewer and the animals were becoming 8as well.

    One summer, it rained 9in the village. The rain lasted for about a week. The soil and the stones on the mountain fell down and soon 10the whole village. They finally realized they couldn't only cut down trees but also needed to protect them.

    There are many kinds of pollution around us, 1 air pollution, soil pollution, noise pollution and light pollution. They are bad 2 our health in many ways.

    Burning gas, oil and coal creates air pollution. It can cause some eye and breathing problems.

    With the 3 of pollution and the development of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish in the land. Farmers use too many 4 in the fields. They destroy the soil.

So soil pollution has become serious.

    Noise pollution can make people 5. For example, people may lose their hearing if they have worked in a 6 place for a long time. Too much noise can cause high blood pressure 7.

    Having worked for a long time in strong, changeable light 8 cause some kinds of illnesses. It makes people feel 9 and is especially bad for the eyes.

    With 10 pollution, our planet will become greener and our health will be better. Let's be greener people.

    Each one of us shares this planet with about seven billion others. And we all need1. People and products need to move from city to city and country to country. However, we all know2most cars, motorcycles, boats and planes cause air pollution. They are also noisy. This is a serious problem in many cities.3inventors are coming up with creative ideas to try to reduce the air pollution and noise.

    In many cities around the world, motorcycles are very4. Now Vietnam has around 33 million motorcycles and China has almost 120 million, Motorcycles are a faster and cheaper way to get around a city than5. Yet air pollution is a growing problem. In large cities, people complain it is difficult to breathe. To solve these problems, a US company designed an environmentally friendly motorcycle. It uses electricity as fuel (燃料). As a result, there is6pollution. It's also quiet and fast. This makes it a good choice for getting around a city.

    The Italian city of Venice is a city with only a few roads. There are no cars in the city centre.7cars, water taxis and buses carry people along the city's canals. However, they cause pollution,8to the water. English engineers Dick and Jem designed a solar powered(太阳能的) water taxi. The water taxi can run for a day after being charged.

    Planes also cause air and noise pollution. Designing an environmentally-friendly airplane is a real9. Some airplane companies have10to solve the problems. Swiss engineers have gone one step further. They developed a solar airplane. This plane holds the world record for the longest solar powered flight—1, 541 kilometres from Arizona to Texas in America.

    Global warming means the temperature of the Earth is getting higher and higher. If the Earth gets 1, some of the following things could happen:

    The sea level could 2 because of the melting of sea ice.

    Many animals that live on the ice might 3 out.

    There could be more floods(洪水), 4 near the sea and rivers.

    Some plants and animals might die because they cannot live in high 5.

    Global warming is a very 6 problem now. There is something we can do to help to slow it down.

    Scientists have been studying global warming for years. They have found that some things that people do in everyday life make much gas that 7 global warming. One big cause of this is the burning of oil, gas and coal for energy for our cars and homes. This gives off too much greenhouse gas. We can do something to cut 8 on the amount of greenhouse gas.

    ⒈ We can really help by using less energy in life, and less gas in our family cars. We should turn off the 9 and turn down other electrical equipment. We should walk more and use cars less.

    ⒉ 10 can take in some of the greenhouse gas. So we should plant more trees.