We always think that it's OK for us to leave our plants home during our vacation as plants won't scream like pets, right?

    A recent study done by a group of scientists at the Tel Aviv University has discovered that some plants will scream when they are under stress.

    The research was carried out on tomato plants and tobacco plants by cutting their stems (茎) and depriving (剥夺) them of water. A microphone was placed 10cm away from them. When their stems were cut, the plants started "screaming" between 20 and 100 kilohertz, and the scientists guess that this scream is probably meant to warn other plants nearby.

    When the tomato plants' stems were cut, 25 ultrasonic (超声的) pain sounds were recorded in an hour, and at the same time, 15 ultrasonic pain sounds were recorded from the tobacco plants. When they were deprived of water, the tomato plants recorded even more pain sounds with 35 pain sounds in an hour while the tobacco plants recorded about 11 pain sounds.

    The plants also acted differently to different kinds of stresses. For example, the tobacco plants gave out a stronger "scream" when they were deprived of water than when their stems were cut. But plants that were in no immediate (立刻的) danger gave out less than one ultrasonic sound per hour.

    The group of scientists said that plants are not as quiet as we had always thought, but in fact their voices are so high-pitched that we just can't hear them.

    Last year, another study has found out that plants feel pain when they are touched or hurt and they will give off a terrible smell.

    Today,roller skating (滑旱冰)is easy and fun. But many years ago, it wasn't easy at all. Before 1743, peoplenever tried skating on wheels. That changed because of a man named John JosephMerlin. Merlin's work was making instruments. In his free time he liked to playthe violin. Merlin was a man with many ideas and many dreams. People called hima dreamer.

    One dayMerlin received an invitation to go to an important party. He was very pleasedand a little excited. As the day of the party came near, Merlin began to think.He wanted to find a way to make a wonderful entrance at the party. Merlin hadan idea. He thought that he would attract a lot of attention if he could skateinto the room.

    Merlintried different ways to make himself roll. Finally, he decided to put twowheels under each shoe. These were the first roller skate shoes. Merlin wasvery proud of them. He dreamed of arriving at the party and skating into theroom while playing the violin. He was sure that everyone would be verysurprised.

    On thenight of the party Merlin rolled into the room, playing his violin. Everyonewas really surprised to see him. There was just one problem. Merlin had no wayto stop his roller skating. He rolled on, playing the violin. Then, with alleyes on him, Merlin hit into a huge mirror on the wall. The mirror broke intomany pieces with a very loud noise. But nobody forgot Merlin's wonderfulentrance after that.

①Many people describe New York City as the centre of culture in the United States. That's because no matter what you're interested in, you'll find it in New York City. Whether it's theatre, music, ballet, or museums, the city has some of the very best to offer.

②The street called Broadway in New York City became the centre of American theatre in the mid-19th century. The number, size, and fame(名声) of the Broadway theatres grew as New York City grew. In 1910 the brightly lighted street became known as "the Great White Way". Beyond these theatres the city offers free performances of the plays of William Shakespeare in Central Park. Operas and concerts are also held in the park.

③New York City has a number of world-class space for performances of all kinds. The city's concert halls include those at the Lincoln Centre for the Performing Arts as well as Carnegie Hall and Radio City Music Hall. The groups that perform in these halls include the Metropolitan Opera, the New York City Opera, and the New York Philharmonic. The New York City Ballet also performs at the Lincoln Centre, in the New York State Theatre.

④Museums are another important part of New York City's cultural life. The Metropolitan Museum of Art, the Museum of Modern Art, and the Guggenheim Museum are among the city's art museums. You can also spend many hours in the American Museum of Natural History and its Rose Centre for Earth and Space Science.

⑤With all of these resources(资源) there is always plenty to do in New York City.

Dear Simon,

Thanks for telling me about your problems!

I do hope all the advice can be helpful to you.

Yours,

Joy

①Our body language tells the world a lot about us. But can it change the way in which we see ourselves? The answer is Yes.

②Two scientists, Amy Cuddy and Danna Carney, who know much about body language, did a famous research. According to the result of their research, body language can change the chemistry of our brains. Some high-power body language can make you become confident. For example, you will feel confident when you hold your head high; you will feel confident too when you put your arms out wide as if you have won a race. However, some low-power body language can make you feel unconfident, such as sitting with your arms close to the body, sitting with your legs together or walking with your head down.

③Why do all these happen? The scientists think the reason is that body language changes the amount of something special in our brains. It's called hormone(激素). One kind of hormone can increase your confidence; another kind can increase your stress(压力). But too much stress hormone is bad for learning. It also increases the risk of health problems.

④The result of the research is helpful for your studies. Please remember: try to use more high-power body language in your studies, and you will be confident. That is, always believe you can study well, act as if you were doing well, then you will make greater progress in real life.

  The Chong Yang Festival is {#blank#}1{#/blank#} on the ninth day of the ninth month of the lunar calendar. According to the {#blank#}2{#/blank#} theory(理论) of "Yin" and "Yang"， both the 9th month and the 9th day of the month belong to "Yang"， and "Chong" means {#blank#}3{#/blank#}， so it is called "Chong Yang". Now, it is a day for the elderly(老年人). {#blank#}4{#/blank#} that day, children often go back to their homes and buy warm clothes, delicious food or other things for their {#blank#}5{#/blank#}. You know, it is also an old custom {#blank#}6{#/blank#} climb the mountain. On the {#blank#}7{#/blank#} of  the mountain, we can enjoy beautiful natural scenes and breathe fresh air. Besides, people can also {#blank#}8{#/blank#} the golden chrysanthemum flowers(金菊花), {#blank#}9{#/blank#} chrysanthemum wine(酒), and eat double-ninth cakes. {#blank#}10{#/blank#} a great festival it is!