Clara Barton，founder of the American Red Cross，gained worldwide honor for her dedication to easing human suffering and earned the nickname  “Angel of the Battlefield.”

    Barton was born into a liberal (开明的) freethinking family in 1821. Her elder brothers and sisters happily tutored her in math and reading, so when she entered school at three years old, she could read and spell three-syllable words. {#blank#}1{#/blank#}

    Concerned about Barton's difficulty in making friends, her parents sent her to a boarding school, hoping it would make her more comfortable with her peers. {#blank#}2{#/blank#} Barton lost her appetite and cried constantly. After only one term, she had to be brought home. Then, Barton stayed out of school to nurse her older brother through a serious injury and also volunteered to care for poor families during a smallpox (天花）outbreak.

    In 1861，the Civil War broke out. The sight of wounded soldiers touched Barton deeply. She began to collect and distribute food, bandages, medicines, and other supplies for the Union army.

    {#blank#}3{#/blank#} There, with little concern for her own safety, she cooked meals, assisted surgeons, and comforted wounded soldiers.

    Eventually，because of working too hard，Barton collapsed，ill with typhoid fever (伤寒症). {#blank#}4{#/blank#} It was there that she learned of an organization based in Switzerland — called the International Red Cross, whose work mirrored her own.

    Shortly after Barton arrived back home in 1873，her sister died. {#blank#}5{#/blank#} When recuperating (休养）at a health facility in New York，she began planning for the establishment of an American wing of the International Red Cross. Although at first the government resisted，her efforts finally paid off. The American Red Cross was officially organized on May 21, 1881. Her influence lives on today in the work of the organization she founded.

    A life coach is somebody who helps you reach all kinds of personal and professional goals （目标） ．Each of us has the ability to be our own life coach．Here are some tips for you:

♦ Pay attention to your relationships with others

    Ask yourself the following questions: How do you deal with disagreements? When was the last time you showed your family members that you care for them? Your relationships with friends, family members and teachers show a lot about the kind of person you are.

♦ Face the fears about the future

    Now, imagine that one of your good friends told you that he or she was not strong enough to go back to school． We often give better advice than we are willing to take ourselves．Remember that even the most successful people were probably told that what they wanted to do was impossible, but they followed their dreams and succeed.

♦ Develop your talents

    If you want to reach your goals, you will have to spend more time developing the talents you already have, and uncovering any hidden talents that you haven't discovered yet．So you can take classes in subjects that you are interested in, even if you have no experience.

♦ Be thankful

    Take some time to be thankful for the things you do have．Remember positive memories. Think of the best day（s） you have had in the past month or year．Remember special parties, vacations and holidays．Appreciate the wonderful people you have in your life.

    Have you ever seen the pictures of those suffering people who struggle every day for just a few drops of water? Water is not a never-ending resource（资源）,but a resource more valuable and limited than anything else on the earth. {#blank#}1{#/blank#}But drinking water is becoming less and less.It is important that people understand this.{#blank#}2{#/blank#}

    According to a senior official,China is facing a water crisis（危机）more serious than any other countries in the world.{#blank#}3{#/blank#}Measures must be taken to save water.

    {#blank#}4{#/blank#}?By following these simple suggestions,you will save money on your water bill.Vegetables and fruit should be washed in a bowl rather than under a running tap.Never put the water down the drain（下水道）when there may be another use for it such as watering a plant or cleaning.

    Avoid washing the toilet unnecessarily.{#blank#}5{#/blank#}Take shorter showers.Do not let water run while shaving,brushing your teeth or washing your hair or face.Recently,Singaporeans were urged to shower a minute less as part of a national water protection effort.

    By thinking carefully about your water use in the home and changing some water wasting habits,it is easy to save water.

A.Do not use your toilet as a wastebasket.

B.Saving water is the proper thing to do now.

C.Some other countries are facing water problems.

D.The crisis is caused by widespread drought（大面积的干旱）,pollution,rapid economic growth and waste.

E.Water is the most important thing for life.

F.People can overcome drought by saving water.

G.It is important to use water wisely.

    Radar（雷达） 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. During World War II many countries used radar effectively.

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

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

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

    A fresh-faced batch of teenagers just began a new school year, but will they get the most out of it? In the mornings, many are forced to get to school much too early. And at night, screens are a temptation that's hard to resist. This double whammy (双重灾难) is a perfect lesson in sleep deprivation (剥夺).

    Three out of every four students in grades 9 to 12 fail to sleep the minimum of eight hours that the American Academy of Medicine recommends for their age group. In most cases, insufficient sleep results in reduced attention, preventing students' progress and lowering grades. More alarmingly, sleep deprivation may lead to physical and emotional problems.

    It is important to understand why teenagers have a particularly hard time getting enough sleep, and what adults need to do to help. First, a reminder of the basic biology: Adolescents are no longer the morning larks of their younger years. They become rewired as night owls, staying awake later and then sleeping in. This is mostly driven by changes in the way the brain responds to light.

    New technology habits aren't helping. More teenagers now turn to activities involving screens at night. The growth in screen time is particularly problematic for sleep. The blue light emitted by LEDs, TVs, tablets and smartphones suppresses the body's secretion (分泌) of melatonin, the hormone that signals it's time to sleep. Overdosing on screens at night effectively tells the brain it's still daytime, delaying the body's cues to sleep even further.

    Parents should inform their kids of the time that can be spent on screens, and praise children who show signs of regulating their own media consumption. In the hour before bedtime, there should be a suspension on bright lights in the home, avoiding devices and harsh LED bulbs in kitchens and bathrooms.

    In 2016, the American Academy of Pediatrics recommended that middle and high schools start no earlier than 8: 30 a. m., a policy now backed by the American Medical Association and many other health organizations.

    Parents also need to join forces with community leaders, sleep scientists, health professionals and educators to put school start times on the local, then state agendas.

    Whenever schools have managed the transition to a later start time, students get more sleep, attendance goes up, grades improve and there is a significant reduction in car accidents.

Discovering the Lost City

Sixty miles south, in Cusco, Hiram Bingham gazed thoughtfully at the old Incan stone wall. He had come to this place in search of Vilcapampa, the lost city of the Inca. But right here was the most beautiful stonework he had ever seen-huge stones cut so perfectly that not even a razor blade could be slipped between them.

The Inca had no iron tools to carve them, no wheel or animals to move them. The wall had endured time and earthquakes.{#blank#}1{#/blank#}

It was a mystery.

He walked through the cobbled streets of the old capital, Cusco. The Spanish had come to this city, conquered the Inca, taken their gold, and built churches over their temples. Suddenly, he stopped. Before him was the famous Temple of the Sun. He placed his hands on the sun-warmed stones so beautifully carved, as if they had grown together.

{#blank#}2{#/blank#}Would it hold gold and riches like the Spanish had found in Cusco? More than ever he was determined to find that city.

The next day Bingham began his search. He would look for ruins-that might be the key. He and his party, accompanied by the military man Sergeant Carrasco, left for the holy valley of the Urubamba River. They came to the sleepy old village in the valley, long ago an important city.

"Are there any ruins nearby?" Bingham asked. "Do you know of the lost city of Vilcapampa?" No one knew of it. Traveling north, the adventurers came upon a remote and wild canyon. In the distance were snowcapped mountains over three miles high.{#blank#}3{#/blank#}Bingham's determination to find the lost city grew with each turn of the increasingly wild path.

Far below in the valley, Bingham's party camped on a sandy beach alongside the thundering rapids of the Urubamba River. Days had gone by. No one knew of any ruins.

{#blank#}4{#/blank#}

This time, through the interpreter, the farmer said, "Yes. There are very good ruins on top of the mountain called Machu Picchu." The farmer pointed straight up.

"Can you take us there?" Bingham asked.

...

A. Hidden in the mountains, the lost city would be built of stones like these.

B. What could he be thinking!

C. But now the adventurers aroused the curiosity of a local farmer named Arteaga.

D. How had they built them!

E. Cliffs rose thousands of feet above the roaring rapids of the Urubamba River.

F. Suddenly, the clouds drifted away and there it was.