Square dancing has been popular for quite a few years.  Its lovers believe it is good for elderly people's health But in recent years, it has many haters as well. They think too loud music or dancing too late into night influences people's life. Should square dancing be supported or limited? Here are opinions from two groups of people.

    Square dancing has been a hot topic in daily life. People have been discussing {#blank#}1{#/blank#} it should be supported or limited. Lovers believe it can help elderly people stay healthy. Those parents who live {#blank#}2{#/blank#} can communicate with others while dancing. If people are {#blank#}3{#/blank#} with large places by governments and they can dance a bit far away from living blocks, few neighbours will complain. Haters say the noise caused by square dancing is the main {#blank#}4{#/blank#} why they are against it. They think square dancers just do what they like to do without {#blank#}5{#/blank#} others' feelings. And square dancing.is not the only good way for all people to exercise.

    I was coming back home late at night in a ”Sharing” minivan. In Hyderabad, India, it is a cheap and quick means of transport. The van drivers ply (揽客) as many as 13 people at times in a vehicle which is designed for the transport of 8 people．Our van was crowded as well. People were getting off and on at many places.

    On the journey, one girl waved her hand to ask the driver to stop. While getting down, she tripped and fell．None of us notice it，as it was dark. The driver was waiting for her to pay. It was then that we saw the girl was on her knees by the side of the road. Another passenger and l got down and held her up．

    Even in pain, the girl held up a note and asked us to pay the driver．The other passenger took the note and paid the driver．My stop was a few hundred meters away. I decided to stay with her till she was fine. I paid the driver for myself and he took off with the other passengers.

    I neither knew her nor did I know what to do, but I was there, saying some comforting words to a stranger in pain. I asked her to stand still for a few minutes. We then looked for a place for her to sit. From out of nowhere, her friend joined us.

    We made her sit in a nearby grassland and her friend rushed to get a taxi. In the meantime, she examined her leg and her ankle had swollen up (肿胀). It looked like a sprain (扭伤). Once her friend came back, they took the taxi and rushed to a hospital. Before they left, the girl thanked me and said they could manage as it was only a small sprain.

    I do not know if I did enough. But I feel I gave some comfort to her in a small way.

Dear Mike,

    Greetings from Los Angeles! Thank you for your postcard. Yes, your mother and I can visit you at Christmas. We thought to stay at home on Christmas Day, but now we are going to stay with you. And Jack isn't going to school then.

    The weather in Los Angeles is cold, but it doesn't matter. Sometimes we like the snow.

    We are going to buy plane tickets tomorrow because your mother wants to take a plane and she thinks it is fast. We will get to your city on December 18th. Our plan is to stay with you for two weeks. Is that all right with you？

    We are going to take our favourite recipes(食谱), so we can have a nice Christmas dinner on Christmas Day.

    See you soon.

Love,

Dad

    On 19th September 1783, Pilatre De Rozier, a scientist, sent the first hot air balloon. The passengers were three animals and the balloon stayed in the air for about 15 minutes before hitting back to the ground.

    The first manned(载人的) flight was about 2 months later, with a balloon made by 2 French brothers. The balloon flew for a period of 20 minutes.

    Sailing through the sky in the balloon, high above buildings and trees, you can't feel or hear the wind because you're traveling in the same direction and at the same speed as it is.

    A hot air balloon has three main parts: the balloon, called an envelope; a basket, where passengers ride; and a burner system, which supplies the hot air.

    Most balloon envelopes are made of strong, lightweight nylon(尼龙). They are different in size and shape, but they have to be really, really big to lift even one person. Most weigh more than an adult man.

    The basket is usually made of wicker(柳条), which is strong but not too hard. It needs to bend a bit for a soft landing, just like a good jumper bends her legs instead of keeping them straight when she lands.

    The hot air balloon works on the theory that hot air rises faster than cooler air. When the burner system is turned on, it makes a noisy sound, but once the balloon is flying, the burner can be turned off. The air in the envelope will then cool, and the balloon will slowly go down unless the pilot starts the burner system again.

    To control a hot air balloon, a pilot adds hot air to it to go up or lets the air out to go down until he finds a wind blowing in the direction he wants to fly. But no matter which way the wind blows, the passengers have an amazing bird's-eye view of the world.

    Eaten any wood today? You may have! And you possibly brushed your teeth with it and you are even dressed with wood. You might know that paper is made from wood. But we get a lot more from trees than paper! In fact, more than 5,000 wood products make our lives better each day. It's true! From toothpaste to photo film, wood products are all around us.

    Wood resin(树脂) is one of many chemicals we get from trees. When a tree gets hurt, resin will form as a protective(保护性的) coating around the wound to stop the insect. People collect the resin and use it to produce paint, glue and soap.

    There are also tree-based chemicals in many of the foods we eat and drink. Some of these chemicals are used to add colours to soft drinks, others to keep food from going bad too quickly. For example, snack food, milk shake and ice creams can be made with cellulose (纤维素) from trees.

    Our life is full of products that come from trees. Now, how many tree products can you see from where you are sitting right now?