We do not know when man first began to use salt, but we do know that it has been used in many different ways throughout history. Historical evidence shows, for example, that people who lived over 3,000 years ago ate salted fish. Thousands of years ago in Egypt, salt was used to preserve (保存) the dead.

    Stealing salt was considered a major crime (罪行) during some periods of history. In the eighteenth century, for example, if a person was caught stealing salt, he could be put in prison and his ears could be cut off.

    In the Roman Empire, one of the most important roads was the one that carried salt from the salt mines to Rome. Guards were stationed(安置) along the route to protect against salt thieves, and they received their pay in salt, thus bringing the English word, salary. Any guard who fell asleep while on duty was thought to be “not worth his salt”, and as a result he would get a little less salt on his next payday. The expression, “not worth his salt”, is still used today in English.

    In the modern world salt has many uses beyond the dining table. It is used in making glass and airplane parts, in the growing of crops, and in the killing of weeds (杂草). It is also used to make water soft, to melt (融化) ice on roads and highways, to make soap, and to fix colors in cloth.

    Salt can be got in various ways besides being taken from mines underground. Salt water from the ocean, salt water lakes or small seas can be used to make salt. Yet, no matter where it comes from, salt will continue to play an important role in the lives of people everywhere.

    Fix it on your own

    Did you know that a bowl of rice could save your iPod if you drop it in a swimming pool by accident? Or that the camera on your phone could tell you what's wrong with your TV remote control(遥控器)? The experts at Geek Squad have made a gadget (小机件) rescue guide. So, let's take a look at some of their useful advice.

    How to get more juice out of your phone battery (电池)

    If your battery goes dead but you need to get a number or send one last text, try warming it up. That may give you a tiny bit of power. Take the battery from the phone and rub it between your hands. Or warm it under your arm for a few minutes. Then try to start the phone-but use it quickly.

    What to do if your gadget gets wet

    First, try drying it out with a vacuum cleaner(真空吸尘器). If a vacuum cleaner isn't at hand, fill a pot or bowl with uncooked rice and put your wet gadget inside. The dry, uncooked rice will absorb all the water and, after a few hours, you should be able to use the gadget. Don't forget to remove the battery and SIM card before you dry it.

    What to do if your TV remote control stops working

    If replacing the batteries doesn't work, get the camera function up on your phone and point the remote at the lens (镜头). When you press a button on the remote, if it is working, the glass bobble (小球) at the front of the remote will light up when you look at it on the screen of your phone. This is because the screen on a phone or digital camera picks up infrared rays (红外线), even though your eyes don't. If the glass bobble doesn't light up, the remote is broken. If it does, the receiving device is broken.

    Japanese students work very hard but many are unhappy. They feel heavy pressures from their parents. Most students are always told by their parents to study harder and better so that they can have a wonderful life in the future. Though this may be a good idea for those very bright students, it can have terrible results for many students who are not gifted(有天赋的) enough. Many of them have tried very hard at school but have failed in the exams and have their parents lose hope. Such students felt that they are hated by everyone else they meet and they don't want to go to school any longer. They become dropouts.

    It is surprising that though most Japanese parents are worried about their children, they do not help them in any way. Many parents feel that they are not able to help their children and that it is the teachers' work to help their children. To make matters worse, a lot of parents send their children to those schools opening in the evenings and on weekends — they only help the students to pass the exams and never teach them any real sense of the world.

    Many Japanese schools usually have rules about everything from the students' hair to their clothes and things in their school bags. Child psychologists(心理学家) now think that such strict rules are harmful to the feelings of the students. Almost 40% of the students said that no one had taught them how to get on with others, how to tell right from wrong and how to show love and care for others, even for their parents.

    Two hundred years ago the English poet William Wordsworth wrote "I wander'd Lonely as a Cloud", a poem that expresses a basic spirit of early English Romanticism.

    What makes this poem an example of Romantic thinking? It isn't just that Wordsworth chooses to write about natural scene：it is the way he describes the scene as if it had human emotions. For him, nature is not only a neutral (无感情色彩的) mixture of scenery, colours, plants, rocks, soil, water and air. It is a living force that feels joy and sadness, shares human pain and even tries to educate us human beings by showing us the beauty of life.

    Wordsworth's home, Dove Cottage, is now one of the most popular destinations in the Lake District. You can go on a tour of the garden which William planted with wild flowers and which survived in his backyard even after they disappeared from the area "He always said that if he hadn't been a poet, he would have been a wonderful scenery gardener," says Allan King of the Wordsworth Trust.

    The place near Ullswater, where Wordsworth saw the daffodils(水仙花), is at the southernmost end of the lake. The lake is wide and calm at this turning point. There's a bay where the trees have had their soil eroded(侵蚀)by lake water so that their roots are shockingly exposed. You walk along from tree to tree, hardly daring to breathe, because you are walking in the footprints of William from two centuries ago. The first group of daffodils appear, but they aren't tall yellow trumpets(小号状的花)proudly swinging in the gentle wind. They're tiny wild daffodils, most of them still green and unopened, in groups of six or seven. They're grouped around individual trees rather than collecting together.

    But as you look north, from beside a huge ancient oak, you realize this is what delighted Wordsworth: group after group of the things, spread out to left and right but coming together in your sight so that they form a beautiful, pale-yellow carpet. What you're seeing at last is nature transformed by human sight and imagination.

    Hacking isn't just for computers and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant's genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world.

    Photosynthesis（光合作用）is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant's genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent.

    "Specifically, scientists hacked the plant's protective system. Normally, this system is activated when a plant gets too much sunlight, "said scientist Krishna Niyogi, co-author of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow.

    Stephen Long is the lead author of the study. He compared a plant's protective system to light-adjusting glasses. When a person wears the glasses outside during the day, the lenses（镜片）darken and lighten depending on how sunny it is. Plants do the same thing, he said. But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food.

    The new study sped up the process. By changing the plant's genes, the protective system turned on and off more quickly than normal. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they think the genetic changes will produce the same results in corn and rice.

    What do you order when you go to a Chinese restaurant? Do you start with an appetizer of fried dumplings and then move onto General Tso's chicken? {#blank#}1{#/blank#}

    Tofu is made from soybeans(黄豆).There are different types of tofu, from soft creamy silken tofu to pressed extra firm tofu. The difference is the amount of water in them. The longer the tofu is pressed, the more water is squeezed out and the tofu becomes denser(更密实)and chewier.

    {#blank#}2{#/blank#} In the letter to his friend John Bartram, Franklin cites(引用)a description of a type of Chinese cheese made from soybeans called "teu-fu" by Fernandez Navarette who published accounts of his travels to China in the late 1600's.

    However, there isn't much documentation of tofu production in the United States. {#blank#}3{#/blank#}

    In 1917, as part of an effort to develop new sources of protein for American soldiers during World War I, the United States Department of Agriculture sent Chinese-born doctor Yamei Kin a dietitian well-known for promoting tofu as an nutritious meat alternative, to China to study soybeans {#blank#}4{#/blank#}

    It wasn't until the 1970's that tofu started to become better known, during a wave of interest in vegetarianism(素食主义), natural food, and less wasteful food sources. {#blank#}5{#/blank#} And the restaurant, chain Chipotle successfully added tofu to its menu a few years ago.

A. Americans are not big consumers of tofu.

B. Let's take a look at tofu and its history in the United States.

C. Or do you start with deep-fried tofu and then choose Ma Po tofu instead?

D. Today, you can buy different types of tofu in many American supermarkets.

E. Despite the government's efforts, interest among the American public never picked up.

F. One of the earliest references to tofu by an American is in a letter by Benjamin Franklin.

G. It is likely that by the early 1900's, cities with large Asian populations had small tofu shops.