A young man and an old man were waiting for a bus. {#blank#}1{#/blank#} sat next to each other. “What's that in your bag? ” asked the young man, pointing to a big bag beside the old man.“Gold. There was nothing but gold,” Answered the old man. The young man could not believe his won ears and was {#blank#}2{#/blank#}great amazement. Then he began to think about {#blank#}3{#/blank#}to get the gold. The old man was very tired and it seemed that he could hardly keep his eyes open. After a while the old man {#blank#}4{#/blank#}(lie) down on the chair and fell asleep.The young man took {#blank#}5{#/blank#}big bag gently and quietly. But when he was just about to run away, he found a corner of his fur coat was under the old man's body. Several times he tried to pull it out, {#blank#}6{#/blank#} in vain. At last he took off his coat, {#blank#}7{#/blank#} (think) that the gold in the bag must cost far more than his fur coat. Nervous but {#blank#}8{#/blank#}(delight), the young man ran out of the station as quickly as his legs could carry him until he reached a place {#blank#}9{#/blank#}he thought the old man couldn't find him. He stopped and quickly opened the bag but he just found a great many of small stones in it. Then he ran back to the station {#blank#}10{#/blank#}(hurry) only to find that the old man was gone.

The history of air conditioners (空调) started in the early days with the need to preserve food. The food{#blank#}1{#/blank#}is kept at room temperature spoils easily due to the growth of bacteria. At temperature below 4℃, the growth of bacteria reduces{#blank#}2{#/blank#}(rapid). As a result of the development in food refrigeration, other following applications include air conditioning and manufacturing processes.

    The{#blank#}3{#/blank#}(discover) of the principles of the absorption type of refrigeration in 1824 showed that liquefied ammonia (液氨) could cool air. At first, the commercially available use of air conditioning applications was based on the need to cool air for industrial processes rather than {#blank#}4{#/blank#}(person) comfort. The first electrical air conditioning{#blank#}5{#/blank#}(invent) by Willis Haviland Carrier in 1902. He was also known{#blank#}6{#/blank#}the Father of Modern Air Conditioning.{#blank#}7{#/blank#} (he) invention was designed to improve the manufacturing process of a printing factory. By{#blank#}8{#/blank#}(control) the temperature, the process was made more efficient.

    The Carrier Air Conditioning Company of America was set up by him {#blank#}9{#/blank#}(meet) the demand of better productivity in the workplace. Today, Carrier Corporation is{#blank#}10{#/blank#}biggest air conditioner manufacturer and marketing corporation in the world in central air conditioning.

    How are you getting along with your high school? It may be hard for you as this is the first time that you {#blank#}1{#/blank#}(leave) your parents. I know that you are now having trouble{#blank#}2{#/blank#}(communicate) with others. That's{#blank#}3{#/blank#}you are new here and people don't know about you. But I think you can follow the advice below.

    First, you should take{#blank#}4{#/blank#}active part in the discussions and show your own opinions about the matters, and at the same time, learn to listen to other people's views{#blank#}5{#/blank#}(careful). Second, you should learn about your classmates' likes and dislikes,{#blank#}6{#/blank#}can make you get familiar with them. Only in this way can you get to know more{#blank#}7{#/blank#}(difference) people and show them that you are just as friendly. I'm always here ready to help. We can take part in some{#blank#}8{#/blank#}(activity) together and I can introduce you to others.

    There's no need{#blank#}9{#/blank#}(worry) too much. People will know you more very soon and will like to make friends{#blank#}10{#/blank#}you if you can do as the above.

    We've all turned to sad music to make us feel {#blank#}1{#/blank#} (good)at some point in our lives, but why does doubling down on the sadness help drag us out of the mire(泥沼)？

    A new study sheds light on what's going on inside our brains {#blank#}2{#/blank#}we match our music to our feelings. It looks like sad music can be enjoyable -rather than {#blank#}3{#/blank#}(simple) depressing- because it triggers positive memories that can help to lift our mood. Psychologist Adrian North from Curtin University in Australia says there {#blank#}4{#/blank#} (be)two groups of possible{#blank#}5{#/blank#} (explain)for why we enjoy listening to sad music like this: one from social psychology, and one from cognitive neuroscience(认知神经学).

    In terms of social psychology, one way of {#blank#}6{#/blank#}(think) about this is that we feel much better about {#blank#}7{#/blank#} (we) if we focus on someone who's doing even worse, a process known as downward social comparison. Everything's going to be okay, because this person {#blank#}8{#/blank#}(have) an even worse day than you are.

    Another theory from social psychology is that people like to listen {#blank#}9{#/blank#} music that mirrors the tone of their current life circumstances -the songs act as {#blank#}10{#/blank#}sort of tuning fork(音叉) for our own situations and they resonate(共鸣) with us

    What makes the sea tum red and causes thousands of fish to die？As far back as anyone could remember, the blame was placed on the "red tides." In 1947, scientists finally connected the red tides with a microscopic sea organism(有机体){#blank#}1{#/blank#}(call)the dinoflagellate.

    The dinoflagellate is so tiny {#blank#}2{#/blank#} 6, 000 of these organisms may be contained in {#blank#}3{#/blank#} single drop of water. It stands on the borderline between plant and animal in its classification, it produces its own food, as plants do. But it moves {#blank#}4{#/blank#}(free)and eats other organisms, as animals do.

    Dinoflagellates are normally only one of the many kinds of organisms found in plankton. Plankton is the name given to all very small {#blank#}5{#/blank#}(form)of sea life. However, when the air and water {#blank#}6{#/blank#}(be)calm and warm, dinoflagellates multiply with {#blank#}7{#/blank#}(amaze)sped. The surface of the water appears {#blank#}8{#/blank#}(cover)with a red carpet.

    The dinoflagellates give off a poison. Many fish die. Their bodies are washed up on the beach. Beaches are not fit {#blank#}9{#/blank#} any use. Fish that are not killed may become {#blank#}10{#/blank#}(poison)to animals or people who eat them. Commercial fishing comes to a stop.

    As dinoflagellates consume all the food and oxygen in an area, they die. After a time, the sea returns to normal. But when conditions are right, the red tide comes again.