If anyone had told me three years ago that I would be spending most of my weekends camping. I would have laughed heartily. Campers, in my eyes, were people who enjoyed insects bites, ill-cooked meals, and uncomfortable sleeping bags. They had nothing in common with me. {#blank#}1{#/blank#}.

The friends who introduced me to camping thought that it meant to be a pioneer. {#blank#}2{#/blank#} We sleep in a tent, cooked over an open fire, and walked a long distance to take the shower and use the bathroom. This brief visit with Mother Nature cost me two days off from work, recovering from a bad case of sunburn and the doctor's bill for my son's food poisoning.

    I was, nevertheless, talked into going on another fun-filled holiday in the wilderness.   {#blank#}3{#/blank#} Instead, we had a pop-up camper with comfortable beds and an air conditioner. My nature-loving friends had remembered to bring all the necessities of life.

    {#blank#}4{#/blank#} We have done a lot of it since. Recently, we bought a twenty-eight-foot travel trailer complete with a bathroom and a built-in TV set. There is a separate bedroom, a modern kitchen with a refrigerator. The trailer even has matching carpet and curtains.

    {#blank#}5{#/blank#} It must be true that sooner or later, everyone finds his or her way back to nature. I recommend that you find your way in style.

    Lots of people find it hard to get up in the morning and put the blame on the alarm clock. In fact, the key to easy morning wake-up lies in resting your body clock{#blank#}1{#/blank#} Here is how to make one.

    ● {#blank#}2{#/blank#} In order to make a change, you need to decide why it's important. Do you want to get up in time to have breakfast with your family, get in some exercise, or just be better prepared for your day? Once you are clear about your reason, tell your family or roommates about the change you want to make.

    ● Rethink mornings. Now that you know why you want to wake up, consider re-arranging your morning activities. If you want time to have breakfast with your family, save some time the night before by setting out clothes, shoes, and bags.{#blank#}3{#/blank#}That's a quarter-hour more you could be sleeping if you bought a coffee maker with a timer.

    ● Keep your sleep/wake schedule on weekends. If you're tired out by Friday night, sleeping in on Saturday could sound wonderful. But compensating on the weekends actually feeds into your sleepiness the following week, a recent study found. {#blank#}4{#/blank#}

    ● Keep a record and evaluate it weekly. Keep track of your efforts and write down how you feel. After you've tried a new method for a week, take a look at your record.{#blank#}5{#/blank#}If not, take another look at other methods you could try.

    Every living thing has genes. Genes carry information. {#blank#}1{#/blank#} They make sure that humans give birth to humans and cows give birth to cows. They also make sure that a dog doesn't give birth to a frog, or an elephant to a horse. However, genetic engineers take genes from one species-for example, a snake, and transfer them to another-for example, corn. {#blank#}2{#/blank#} Such new life forms have been described, by some scientists as a real-life Frankenstein(科幻怪人).

    Genetic engineers put duck genes into chicken to make the chickens bigger. They put hormones(激素) into cows to make them produce more milk. They put genes from flowers into beans and from fish into tomatoes. {#blank#}3{#/blank#} It just makes them easier and faster for the farmer to grow.

    The effects of genetic engineering on the natural world may be disastrous. The engineers may create strange life beings, or monsters. that we cannot control. {#blank#}4{#/blank#} They'll have to find one, fight for one-or kill for one. It may be your land they fight for-or you that they kill. Moreover, the effects of these experiments can often be cruel. In America, pigs were given human genes to make them bigger and less fatty. The experiment failed. The pigs became very ill and began to lose their eyesight. We would all like a better, healthier and longer life, and genetic engineering might give us this. On the other hand, it may be a dangerous experiment with nature. In the story of Frankenstein, the doctor created such a terrible and dangerous monster that he had to destroy it. {#blank#}5{#/blank#}

A. The information tells us what to do or what not to do

B. We must make sure that this tale remains a story-and no more than that

C. This doesn't make them cheaper, tastier, or healthier

D. The new life forms have no natural habitat or home

E. Then they feed the tomatoes to the fish

F. In this way a new life form is created

G. They are passed on from generation to generation

    Radar is an electronic device that detects planes, ships, coastlines, landmarks, and even storm clouds. The name radar comes from the first letters of the words radio direction and ranging. As the human eye uses light waves to see, radar "sees" with radio waves. Without radar, planes could not land safely in bad weather and ships could not move safely in thick fog. {#blank#}1{#/blank#}

    In the 1800s it was discovered that radio waves could be reflected from objects. But scientists did not make great advances in radar research until the 1930s, when the world was threatened by war.{#blank#}2{#/blank#} It has been used widely in almost every conflict since then.

    Echoes make it possible for radar to work. When a beam of radio waves is sent out, it strikes on an object and returns an echo. This echo is picked up by radar and recorded on a screen similar to television screen. On the screen an observer sees a flash, or a blip, that shows the direction and distance of the object. {#blank#}3{#/blank#}

    Airport control towers use radar to guide planes in for safe landings. Almost all large ships depend on radar to prevent collisions with icebergs or other ships. {#blank#}4{#/blank#}Weather forecasters "see" the size, direction, and speed of storms on radar screens. Astronomers can even use radar to measure accurately the distance to the moon. Thus, the device has generated major advancements.

    {#blank#}5{#/blank#}Huge radar antennas have been installed all over the United States. They guard us against possible enemy attacks. We have ballistic—missiles (战略导弹)warning systems that can alert us to attacks when missiles are more than 1,000 miles away. Other radar systems warn us against enemy aircraft and even spying space satellites.

A. Police track speeders in radar-equipped cars.

B. These measurements are now highly accurate.

C. The device can be used in a wide range of fields.

D. It is therefore especially valuable to shippers and travelers.

E. During World War II many countries used radar effectively.

F. Today radar is used by commercial airliners and weather forecasters.

G. Strengthening national defense is one of radar's most important functions.

    Do you still remember the haze (雾霾) in the winter? So many people got terribly ill during or after the haze. {#blank#}1{#/blank#}Here is advice for you to protect yourself in hazy weather.

    Spend less time outdoors. This is the most effective way for self-protection in such bad weather. With PM 2.5 increasing 103mg per cubic meter, residents will risk a 2.29% increase of death, which experts found out in 2013. If you have to get out, avoid riding bicycles. {#blank#}2{#/blank#}

    Close your windows. Experts advise residents to avoid opening windows at home if you have to, avoid the time when smog is at its densest (浓的) {#blank#}3{#/blank#} Besides, you can keep plants with broad leaves at home to absorb dusk, and use air purifiers.

    Smoke less. {#blank#}4{#/blank#} In hazy weather, smoking would be even more harmful. Smokers are advise to keep their distance from cigarettes before the weather gets better.

    {#blank#}5{#/blank#} For example, wear special masks outside to avoid breathing in PM2.5. Then take off your coat after getting indoors and keep it away from your other clean clothes. Don't forget to wash your face, rinse your mouth, and clean your nasal cavity (鼻腔) to clean the particulate matters(颗粒物) that fall on you. Last but not least, keep off stimulating foods.

A. Pay attention to other daily things.

B. Wear masks.

C. That's because haze does harm to the health of people.

D. Also avoid rush hours, when pollutants will be denser.

E. For residents who use air-conditioner, make sure your apartment has enough oxygen indoors.

F. Take more fruits and vegetables instead, which are good for lung, spleen and kidney.

G. Cigarettes could cause more particulate matters, which are included in PM 2.5.

    We need to do more to help the teachers who are exhausted and stressed

    Teaching should not be one of the most stressful jobs in the US. But it is. “The only other profession that comes close to us for stress is nursing and we still have the numbers… by a lot. {#blank#}1{#/blank#}”

    “Nobody realizes how horrific working conditions are for teachers throughout the country,” Brice-Hyde says, an experienced teacher in New York who is part of the national group Badass Teachers Association (BAT).

    {#blank#}2{#/blank#} So they did a national study of teacher working conditions around issues like stress, work-life balance, respect, and more. The results are both surprising and not. If you've been seeing the stories about teacher walkouts and pay inequality, you probably aren't all that shocked to see these things like: 61 percent of educators find work “always” or “often” stressful; 27 percent of educators said they've been threatened or bullied; 86 percent of educators feel disrespected by US Secretary of Education Betsy DeVos.

    Teachers are stressed out, and turnover is high. No wonder we're seeing more stories about the importance of self-care, classroom burnout, and mental health days for teachers. Yet, self-care doesn't seem to come easily for people, and this is definitely true for teachers. {#blank#}3{#/blank#}

    We think it's time to change that, though. So in honor of World Mental Health Day, we are working to change the dialogue about teacher mental health. Below are some of the top challenges people give for not seeking therapy, or even basic self-care, along with possible solutions and workarounds for each one.

    We hope you share this article widely, giving support and love to your fellow educators. {#blank#}4{#/blank#} And it's pretty much guaranteed to help you do what you set out to in the first place be a good teacher.

A. BAT wanted to take action.

B. Those who gave more tended to gain less.

C. The data are ridiculous, and no one is really paying attention.

D. By nature, educators are taught to give care and support others not themselves.

E. Although respected for its own sake, teaching is under suspicion in today's world.

F. After all, self-care, good mental health, positive well-being is one of the single best things you can do for yourself.