What are you going to do if you are in a burning building？How will you escape？Do you know how to save yourself？ Please read the following passage.
    Escaping a fire is a serious matter. Knowing what to do during a fire can save you life. It is important to know the ways you can use and show them to everyone in the family, such as stairways and fire escapes, but not lifts.
    From the lower floors of the buildings, we can use windows. We should learn the best way of leaving through windows with the least chance of serious injury.
    The second floor window is usually not very high from the ground. An average person, hanging by the finger-tips will have a drop of about six feet to the ground. It is about the height of an average man. Of course, it is safer to jump out in a right way than to stay in a burning building.
Windows are also useful when you are waiting for help. Be sure to keep the door closed, or smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may leaked（渗）into the room.
On a second or third floor, a person can escape through a window that open onto a roof. Then from the roof drop to the ground. Dropping onto cement（水泥）might end in injury. Bushes（灌木丛）and grass can help to break a fall.

    Water has always been necessary for our health. Then what kind of water do you drink, tap water or bottled water? Do you get a healthier, safer and more refreshing(提神的) drink when you buy bottled water off the shelf? My answer is "no", and doing so hurts the environment and your wallet.

    First of all, there are no studies showing that bottled water is better for you, and in fact, it may be less safe than tap water. A study of over l, 000 people in Belfast found that they couldn't tell the differences between tap water and bottled water when asked which was purer, more pleasant, natural and refreshing. Bottled water can come from springs(泉水) or from the mountains. It can also be treated, for example, to have iron(铁) removed. It is reported that there is around 82.8g of CO₂ for a half-liter(半公升) bottle. This will be harmful to people's health when everyone's drinking it. However, bottled water is popular with many people. Its success is from excellent marketing and our laziness in filling reusable bottles with tap water.

    Secondly, bottled water can cost between 500 to 1, 000 times more than dap water. In 2015, the UK drank 2.4 billion liters o of bottled water, and by 2016 this had risen to 2.6 billion liters. Yet, you get this from the tap, for free.

    Besides, recycling is improving, but in America, it is said that only a quarter of bottles can be used again. So is it really so much better that it is worth both paying for and harming the earth? Or should you stop buying it?

    As a general rude, I believe that most of us should enjoy more tap water, and stop using so many bottles.

    Many animals do strange things before an earthquake. This news may be important. Earthquakes can kill people and knock down homes. The animals may help to save lives.

    Some animals make a lot of noise before an earthquake. Farmers have told about this. Dogs that are usually quiet have started to bark (吠). Horses on farms have run around in circles. Mice have left their holes and run away. Cows have given less milk.

    In a town in Italy, cats raced down the street in a group. That happened only a few hours before an earthquake. In San Francisco, a man kept tiny pet frogs. One Sunday, the frogs jumped around more than ever. They made loud noises, like bigger frogs. That night, an earthquake struck the city.

    People want to know when an earthquake is coming. Then they could get away safely. Right now, there is no sure way to know ahead of time. Maybe the best idea is watching the animals.

    There is a lot of salt on the Earth, and it mixes very well with water.

There is some salt in all water. Water on the land runs into lakes and rivers. These rivers run into the seas and oceans. They carry a little salt with them. Some of the ocean water moves into the air and clouds. It evaporates. Salt cannot evaporate. It stays in the oceans.

    The water in the oceans has more salt than river water. There is about 3. 5% salt in the ocean water. Some seas have more salt than others.

    Some of the water leaves the lakes. It evaporates, but the salt cannot. These lakes are very salty. There are two famous lakes like this. They are the Dead Sea in the Middle East and the Great Salt Lake in Utah(犹他州）in the United States. They are much saltier than the Atlantic Ocean（大西洋）and the Pacific Ocean(太平洋）.

    Every day there is less and less space on Earth for rubbish. Yet every day we make more and more rubbish. What can we do? We can recycle some of our rubbish. Recycling means that the rubbish will be made into something that can be used again.

    Recycling helps Earth. And it saves space in rubbish dumps. Half of everything that we put into landfills could be recycled instead. In fact, most things made of paper, metal, glass and plastic can be recycled.

    Paper can be broken into small pieces and made into new paper. Steel and aluminum cans(金属雄)can be melted down(熔化)and made into new cans. The same is true of glass bottles. This can be done over and over again. Recycling doesn't take as much energy as making these things the first time. So we can use less of Earth's fuel resources.

    Plastic can be melted down, too. Then it can be formed into park benches, playgrounds and so on. Some people call plastic the "wood" of the future. Things made of plastic will last about 400 years-even if they stay outside in the weather. No wood can do that!