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.

    In traditional Chinese medicine, food is divided (划分) into two types; hot and cold. Both kinds of food affect (影响) your body {#blank#}1{#/blank#} different ways, So, having 57. {#blank#}2{#/blank#} balanced diet is safe and {#blank#}3{#/blank#} (health) for your body.

    Some examples of hot food {#blank#}4{#/blank#} (be) berries, mutton, and ginger (生姜) . If you eat too much of them, {#blank#}5{#/blank#} (certainly) things might happen to your body. You may start to sweat a lot and feel pain in your back, or even grow gray hair! If these things happen to you, you should avoid (避免) spicy food, coffee, or sugar.

    On  {#blank#}6{#/blank#} other hand, too much cold food like tomatoes and potatoes can also cause problems. It may make your hands and  {#blank#}7{#/blank#} (foot) cold. It also makes your body temperature lower.

    Besides what we eat, {#blank#}8{#/blank#} we eat is also important. You should always sit down and chew (咀嚼) carefully. Don't make {#blank#}9{#/blank#} (you) busy with other things, such as watching TV or {#blank#}10{#/blank#} (read) a newspaper. Finally, it's best to eat three meals a day at regular times.

    Imagine you are taking a walk on the beautiful beach. Just then, your feet step over something and you hear a crack (噼啪声) —an empty plastic bottle. Things like this are happening more often because of sea rubbish.

    Studies show that 80% of all the waste is from the land. The waste is mainly plastics (塑料制品) which are really hard to degrade (降解). So the rubbish will remain there for a long time. Some of the pollution is caused accidentally. For example, about 10,000 product-filled boxes are lost at sea every year from business ships. Sometimes people just throw things into the water from boats or land. Many large rubbish areas are formed in the North Pacific Ocean.

    Thankfully, the situation isn't ignored (忽视). Groups like the National Oceanic and Atmospheric Administration (NOAA) are taking action to help clean the sea. Since 2006,76 projects have cleared out 3,814 metric tons (公吨) of rubbish from the sea. Methods of rubbish cleaning include using machines to remove (移除) the waste away from the surface of sea water. Besides, special nets are set by the mouths of rivers to stop the rubbish before it reaches the sea. If everyone does his part, sea rubbish seems like a problem that can be solved.

Music is good for us. According to the new study from the World Health Organization (WHO), music can 1 us happy and healthy. For example, when I feel 2 listening to some classical music helps me relax. When I'm down, I like pop music full of hope and love. It is easy for 3to fall asleep with light music. Some doctors 4 that people who love music may have a long life.

Near my house, a man and his wife have a small music house with mood music(情调音乐). People like to spend time here when 5are plying different kinds of music. Sometimes, we are lucky to hear some famous singers sing songs written by themselves. The songs are 6beautiful that we sing along with them. We communicate(交流)with one another 7 his special language. The most moving music is Chinese folk music(乡村音乐). It 8_us the sweet days in the past.

Everyone of us, rich or 9, young or old, may have his favorite song. 10 will be together with us as long as we live.

How to learn English

How can you learn English well? Here are my suggestions. 

……

I hope these suggestions can help you.