Happiness means different things to different people. For Mary, who has {#blank#}1{#/blank#} severe sleeping problem, happiness is as simple as having a good night's sleep.

    Bed was once a place {#blank#}2{#/blank#} Mary went to rest after a long, hard day. {#blank#}3{#/blank#}, she has not had a full night's sleep in almost six months. Her doctor said that{#blank#}4{#/blank#}(count) sheep might help her fall asleep. She tried this, but soon got tired of it after it failed to work. She finds the nights without sleep almost {#blank#}5{#/blank#}(bear) . She is always sleepy and lacks energy during the day.

    Mary is not alone. Studies show that more than one in three people worldwide struggle with getting enough sleep. It often takes on different {#blank#}6{#/blank#}(form) : some people can get to sleep, but wake up much too early; some get a full night's sleep, but are {#blank#}7{#/blank#}(disappoint)  to find that they still feel tired when they wake up; others, like Mary, find {#blank#}8{#/blank#} difficult to fall asleep in the first place.

    Specialists say that people should not worry too much about this problem. In most cases, a lack of sleep {#blank#}9{#/blank#}(cause) by anxiety and pressure. It is important to keep yourself {#blank#}10{#/blank#} good spirits and to be positive. 

    Every individual is a member of a group called the community, and it is the duty of every citizen {#blank#}1{#/blank#} ask what he can do for his community. A good citizen {#blank#}2{#/blank#}(相信) that he should serve the community and not the community serve h{#blank#}3{#/blank#}. As students, there are many ways in {#blank#}4{#/blank#} you can serve the community. Above all, however, you have to acquire a certain amount of skill and experience b{#blank#}5{#/blank#} you can be of service to others. Your school has lots of{#blank#}6{#/blank#}(活动) which prepare you {#blank#}7{#/blank#} good citizenship. Many school societies train students to become good citizens who later p{#blank#}8{#/blank#} in volunteer work and serve the public in t{#blank#}9{#/blank#} of need. If you serve your community, you will grow {#blank#}10{#/blank#} to be a good citizen with a strong sense of responsibility.

    Yuan Longping is one of China's most famous scientists. {#blank#}1{#/blank#}(work) the land to do his research, he considers himself a farmer. Indeed, his sunburnt face and arms and his slim, strong body are just like those of millions of Chinese farmers, {#blank#}2{#/blank#} he has struggled for the past five decades. When he was young, he saw many people dying of {#blank#}3{#/blank#} (hungry), which was a {#blank#}4{#/blank#}(disturb) problem in many parts of the countryside. Then, he devoted all his time and energy {#blank#}5{#/blank#}searching for a way to increase rice harvests without expanding {#blank#}6{#/blank#} area of the fields. In 1973, he became the first agricultural pioneer in the world {#blank#}7{#/blank#} (grow) rice that has a high output. Now, he remains {#blank#}8{#/blank#}(circulate) his knowledge in many less developed countries to increase their rice harvests. He is quite {#blank#}9{#/blank#}(satisfy) with his life. However, he doesn't care about being famous. He feels it gives him less freedom to do his research. In his view, spending money on himself or {#blank#}10{#/blank#} (lead) a comfortable life means very little to him. He therefore gives much money to equip others for their research in agriculture.

    On a cold evening with snow floating in the air, I got {#blank#}1{#/blank#}(stick) on the road because of a flat tire(轮胎) .I attempted {#blank#}2{#/blank#}（seek）help from the passing cars, but no one stopped. As I was about to give up hope, a man {#blank#}3{#/blank#}（drive）an old dirty car came to my aid. To be honest, I was scared when he first approached me. Eying him up and down, I thought to myself, 'There is a very good chance {#blank#}4{#/blank#} he may rob me.' He seemed to have sensed my discomfort so he tried to ease my {#blank#}5{#/blank#}（anxious）by introducing himself. His act of kindness made me feel ashamed to have questioned his intentions. {#blank#}6{#/blank#}was really considerate of him to stop to help a perfect stranger like me, especially in such terrible weather. Thus, after the spare tire was fitted, I asked {#blank#}7{#/blank#} much I owed him. I wanted to pay him back. {#blank#}8{#/blank#}(surprising), he did not take my offer but rather told me to pass the act of kindness forward and help more people {#blank#}9{#/blank#} need. As he said those words, I noticed him wearing a smile of contentment. Helping others seemed a very {#blank#}10{#/blank#}（nature）thing to him. I witnessed the true beauty of human nature in him.

     Howard Carter is one of the most famous explorers in the world. He was brave and loved to discover new places. By the 1920s, he {#blank#}1{#/blank#} (start)searching for the tombs of the Egyptian Kings. In 1922, Howard Carter and his team made their most {#blank#}2{#/blank#} (amaze) discovery of all. They came across the tomb of King Tutankhamun, {#blank#}3{#/blank#} contained more treasure than any of them had ever seen before, as well as the mummy of the king. After {#blank#}4{#/blank#} (look) into the tomb, they closed it. {#blank#}5{#/blank#} (unlucky), many of the men who had something to do {#blank#}6{#/blank#} the opening of the tomb got ill or even died after that. Some people think the {#blank#}7{#/blank#} (death) were just coincidence or the curse of mummy. {#blank#}8{#/blank#} (other) believe there is a {#blank#}9{#/blank#} (science) reason. What is certain, though, is that She curse of the mummy' remains {#blank#}10{#/blank#} riddle to this day.