Starting in 1972, the National Park Service established a policy for forest fires called Natural Bum. It was true {#blank#}1{#/blank#} some forest fires, such as those which were caused by lightning were necessary for forests{#blank#}2{#/blank#} (keep) balanced ecosystems, so the fire should be allowed to burn{#blank#}3{#/blank#} , a big fire in Yellowstone National Park in 1988 caused this policy to be abandoned (放弃) since the fire was initially allowed to burn yet soon out of control. As a result, the fire of 1988 destroyed much of Yellowstone, which is America's {#blank#}4{#/blank#}(old) and most beloved national park. Massive areas of plants were destroyed, and large empty spaces and acres of burned and blackened trees greeted {#blank#}5{#/blank#} (visit). The rivers and streams were choked with ash, and the ecosystem of the park was changed {#blank#}6{#/blank#} repair.

    In addition, great numbers of animals{#blank#}7{#/blank#} (kill) by the fires that burned out of control. The fires were driven by high winds{#blank#}8{#/blank#} (move) as many as ten miles a day. Many small animals died in the flames. The fires' rapid advances {#blank#}9{#/blank#} (give) the wildlife little chance to escape. Even today, few of these small forest animals have returned to live in the park. In the years immediately following the fires, the numbers of visitors declined{#blank#}10{#/blank#} (rapid).

    Success never comes easy. How many of you have heard of successful people who haven't made any effort? People often have to overcome failures {#blank#}1{#/blank#} they can accomplish something great. They usually don't find success from the very beginning.

    Van Gogh sold only one painting during his lifetime, but this didn't stop him from completing over 800 painting. Thomas Edison {#blank#}2{#/blank#}(fire) from his first two jobs for lack of competence. Later, as an inventor, he tried 1,000 times {#blank#}3{#/blank#} (create) the light bulb, without success. He was confident in {#blank#}4{#/blank#} (he), and{#blank#}5{#/blank#} (eventual) he did success. When{#blank#}6{#/blank#} (ask), “How did it feel to fail 1,000 times?” Edison replied, “I didn't fail 1,000 times. The light bulb was {#blank#}7{#/blank#} invention with 1,000 steps.

    These successful people have set good{#blank#}8{#/blank#} (example) to us. They wouldn't have achieved their success if they{#blank#}9{#/blank#} (abandon)their dreams. Believe in yourself and try your best, and success will not be far {#blank#}10{#/blank#} you.

    I'm Yuan Longping. Look at my sunburnt face and arms and my slim strong body and you will think I'm {#blank#}1{#/blank#} like a farmer than a scientist. In fact I {#blank#}2{#/blank#}(struggle) for the past five decades to help {#blank#}3{#/blank#}(farmer). In 1974, I began to grow a so-called super hybrid rice. This special strain of rice makes {#blank#}4{#/blank#} possible to produce one-third more of the crop in the same fields.

    I was born into a poor farmer's family in 1931. When I was young, I saw many people go hungry often. So I have devoted myself to {#blank#}5{#/blank#}(find) ways to increasing rice harvest without expanding the area of fields since I graduated from Southwest Agriculture College in 1953. Now more than 60% of the rice{#blank#}6{#/blank#}(produce) in China each year is from this hybrid strain. I am circulating this knowledge in India, Vietnam and other less developed countries to increase their harvest. Perhaps you think I am rich. {#blank#}7{#/blank#}(actual) I live a simple life. I care little for money. In my opinion, a person with too much money will have more troubles. I don't want to be famous {#blank#}8{#/blank#} I prefer to have more time to do my research. In my free time I love listening to music, playing mah-jong and reading. I once had a dream, in {#blank#}9{#/blank#} I saw rice plants as tall as sorghum and each ear of rice was as big as an ear of corn and each grain of rice was as huge as a peanut. Now I have another dream-to export my rice so that it can {#blank#}10{#/blank#}(grow) all over the world.

    Believe it or not, have you ever noticed that you feel happier and more relaxed after you eat bread, pasta or fruit? Do you find that you are more energetic and awake after eating yogurt or beans? These things are not accidents. Food affect {#blank#}1{#/blank#} we feel more than we think. Scientists researching {#blank#}2{#/blank#} (it) effect on our moods are beginning to understand that we can influence our feelings with what we eat.

    Although our moods relates {#blank#}3{#/blank#} having various foods, it is not quite as simple as choosing the foods for the right occasions. If that {#blank#}4{#/blank#} (be) the case, athletes would not eat a lot of carbohydrates before a race.

    Another chemical {#blank#}5{#/blank#} (connect) with our mood is caffeine, which {#blank#}6{#/blank#} (find) in coffee, chocolate and many types of tea, is perhaps {#blank#}7{#/blank#} worst thing you can have when you are feeling stressed.

    Of course, {#blank#}8{#/blank#} (enjoy) a nice meal with friends, whatever we eat, can also impact our spirits. Being with friends and family plays a big part in experiencing happiness.

    Most {#blank#}9{#/blank#} (important), though, remember the following old rule: try to eat different food, {#blank#}10{#/blank#} not too much.

    Letters as a way of communication have long given way to phone calls and WeChat messages. But a TV show, LettersAlive, is helping bring this old way to keep in touch back {#blank#}1{#/blank#} the present.

    LettersAlive took {#blank#}2{#/blank#} (it) idea from a UK program, LettersLive, released in 2013. Both {#blank#}3{#/blank#} (show) feature famous actors and actresses, but there {#blank#}4{#/blank#} (be) no eye-catching visual effects or any regular showbiz(娱乐圈) activities. Instead, it's just a live event {#blank#}5{#/blank#} remarkable letters selected from a wide time span and a diverse range of subjects are read. There is, for example, a passionate letter from Huang Yongyu to playwright Cao Yu 30 years ago to criticize his lack of {#blank#}6{#/blank#} (create).

    Every letter is like a small piece of history. By hearing them being read, it's as if we are being sent back in time {#blank#}7{#/blank#} (experience) a moment that we would otherwise never have had the chance to.

    Compared to{#blank#}8{#/blank#} (publish) texts, letters also {#blank#}9{#/blank#} (natural) come with a personal touch. As well as celebrating the pain, joy, wisdom and humor, LettersAlive{#blank#}10{#/blank#} (commit) to promoting Chinese literature since first run.