There exist cruel wars, fighting and sadness in the world today, so it's not only necessary, but also essential to have a good sense of humor just to help us go through difficult times in out lives. Putting a smile on someone's face when you know they are feeling depressed, as the saying goes, makes me feel good and warms my heart.

    How would you feel if you could not joke around with wife, husband, child, co-worker, neighbor, close friend, or even just someone that you are standing in line with at your corner store? I am always saying things that make others smile or laugh, even if I don't know the person I'm joking around with. My Grandma always found humor in everything she did, even if it was the hardest job anyone could imagine. This not only relieves stress in any situation, but also is a common manner to speak to others that are around you.

    I know of a few people that don't have a funny bone in their bodies, as they say. Everyone around them could be rolling on the floor after hearing a great joke and they would sit there without the slightest smile on their faces. They don't get the joke that makes others laugh. I am, busting a gut while they just sit there, looking at me as if I were from outer space. How can people not get a really funny joke?

    Laughing is essential to keep your stress levels under control. Without humor, we would find ourselves with a lot of psychological problems, or on a lot of medications to keep us from going crazy. There is too much sadness and bring a little light into our lives.

    Therefore, I believe our best medicine is to get together and tell some jokes and have some fun laughing together.

    Good health is the most valuable thing a person can have, but one cannot take good health for granted. It is important to remember that the body needs proper care in order to be healthy. There are three things that a person can do to help stay in good: eat right food, get enough sleep, and exercise regularly.

    Proper nutrition is important for good health. Your body cannot work well unless it receives the proper kind of “fuel”. Don't eat too much food with lots of sugar and fat. Eat plenty of foods high in protein, like meat, fish, eggs and nuts. Vegetables and fruits are very important because they provide necessary vitamins and minerals. However, don't overeat. It is not helpful to be overweight.

    Getting the proper amount of sleep is also important. If you don't get enough sleep, you feel tired and easily get angry. You have no energy. Over along period of time a little amount of sleep may even result in a change of personality. Be sure to allow yourself from seven to nine hours of sleep each night. If you do, your body will feel strong and refreshed, and your mind will be sharp.

    Finally, get plenty of exercise. Exercise firms the body, strengthens the muscles, and prevents you from gaining weight. It also improves your heart and lungs. If you follow a regular exercise program, you will probably increase your life-span. Any kind of exercise is good. Most sports are excellent for keeping the body in good shape: basketball, swimming, bicycling, running and so on are good examples. Sports are not only good for your body, but they are enjoyable and interesting, too.

    If everybody were to eat the right foods, get plenty of sleep and exercise regularly, the world would be a happier and healthier place. We would all live to be much older and wiser.

    The eyes are the windows of the soul (心灵) . Having a pair of bright, clear eyes is very important, so we should protect our eyes throughout our lives.

    {#blank#}1{#/blank#} Don't read while lying down or walking. Relax after every hour of reading.

    Keep a distance from the TV set when you watch TV and give your eyes a rest every 30 minutes.

    Don't stare at (盯着看) the sun or try to read in the darkness. {#blank#}2{#/blank#} This can damage your eyes easily.

    Get your eyes checked often. Not many people have this habit, but it is necessary. If you feel that there is something wrong with your eyes, get them checked quickly. {#blank#}3{#/blank#}.

    {#blank#}4{#/blank#}. You can close your eyes for a few seconds or look into the distance for one or two minutes. A small break will relax your eyes and help to stop you from getting eye problems.

    Be careful when you choose your glasses.{#blank#}5{#/blank#}. Make sure your glasses are right for you. If they don't feel right, get your glasses changed.

A. Develop good reading habits.

B. Rest your eyes whenever you can.

C. Make sure you get enough sleep every night.

D. Glasses that aren't suitable for you could bring you trouble.

E. Even if you're wearing sunglasses, never look directly at the sun.

F. Eye problem can be found and treated early with regular checks.

G. Drink green tea every day as a way to protect your eyes against eye problems.

    Technology is always trying to meet our needs and demands. There's a new frontier in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook and serve foods on a mass scale. And the industry isn't stopping there.

    Food production

    With a 3D printer, a cook can print complicated chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that — it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to "recreate forms and pieces" of food that are "exactly the same," freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

    Sustainability (可持续性)

    The global population is expected to grow to 9.6 billion by 2050, and some analysts estimate that food production will need to be raised by 50 percent to maintain current levels. Sustainability is becoming a necessity. 3D food printing could probably contribute to the solution. Some experts believe printers could use hydrocolloids (水解胶体) from plentiful renewables like algae (藻类) and grass to replace the familiar ingredients (烹饪原料). 3D printing can reduce fuel use and emissions. Grocery stores of the future might stock "food" that lasts years on end, freeing up shelf space and reducing transportation and storage requirements.

    Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, "Food printing could allow consumers to print food with customized nutritional content, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand."

    Challenges

    Despite recent advancements in 3D food printing, the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste (糊状物) before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are skeptical about 3D food printers, believing they are better suited for fast food restaurant than homes and high-end restaurants.

    When you visit America, you will see the word Motel on signs and notice boards. It is made up of "motor" and "hotel" and it is really a hotel for people who arrive by car (however, you don't need a car to stay at one). You have to pay when you arrive for your room, which usually has a bath. Meals are not provided, but there will certainly be a cafeteria (自助餐馆). Americans eat a lot of salads and sandwiches. Along the main roads there are a lot of motels. Each tries to offer more than next. Some provide television in every bedroom; others have swimming pools; and so on. Motels are especially useful when you are in the country, far from a town or city. You will also find them in the big National Parks.

    In these great National Parks, you may meet guests you don't expect to see. An American friend told me a little story. In the middle of a moonless night she heard strange noises outside her motel window in the Yellowstone National Park in Wyoming. Thinking it might be a thief, she jumped out of bed, opened the door and crept towards a dark shadow. As she got close, she saw the thief. She was dreadfully frightened: it wasn't a human thief ­ it was a big black bear. The bear was turning over some empty tins with its paw, looking for tasty bits of food. My friend decided to leave that particular thief alone!

    There are also, of course, places called "rooming houses", where they receive lodgers (房客). You will see such signs as Tourists or Rooms Rent, and you could try one of these. A word of warning ­ looking for a room in New York during the tourist season is like looking for gold on the moon!

When did we start walking for leisure?

"Going for a walk" is a popular pastime among older and younger generations alike because of its well-known benefits for our physical and mental health. But you may be surprised to hear that wandering through pretty streets or hiking in mountainous have not always been considered leisure activities, according to Daniel Gale, a researcher of pedestrianism (步行运动).

{#blank#}1{#/blank#} Before that, it was just something people did out of necessity, some of whom even associated it with criminal activity. But for Charles Dickens, the famous English 19th Century author, marching through London streets and tramping around the countryside was a big part of the creative process. {#blank#}2{#/blank#} He walked at an impressive pace of four miles per hour, according to his biography by Peter Ackroyd.

{#blank#}3{#/blank#} Perhaps you can take inspiration from another big-thinking wanderer. 19th Century American writer Henry David Thoreau took a slower approach, preferring to stroll over hills and fields and through the woods. He said that he could not preserve his health and spirits without walking at least four hours a day.

This idea of taking a stroll to clear your head has survived through to the 21st Century. But have pedestrian manners remained the same? A 1780 article for the London Magazine advised pedestrians to avoid things such as hanging around in conversation and obstructing people behind you. {#blank#}4{#/blank#}

In this modern age, when many of us are tied to our desks and to our screens, try the simple act of stepping out onto the city pavements, or getting lost in nature. {#blank#}5{#/blank#} Whether you see yourself more as a casual stroller or a purposeful strider (阔步者), why not build a habit out of it?

A. What if speed-walking isn't your thing?

B. This may make all the difference to our wellbeing.

C. Nowadays, we could add distracted phone-users.

D. He brought the recreation of walking into fashion.

E. Going on an urban walk is much more pleasant now.

F. It was a time to absorb what was going on around him.

G. In Britain, walking for fun wasn't really a thing until the 1780s.