Recently Lindsay hasn't felt herself. She{#blank#}1{#/blank#}(be) a really good student, but her grades has fallen since three months ago. This is because she sometimes has trouble {#blank#}2{#/blank#}(pay)attention to her study. She also refuses to talk with teachers and friends. What's worse, she feels{#blank#}3{#/blank#}(tire) all the time but has difficulty in falling asleep.{#blank#}4{#/blank#}she does is brought to her mother's attention.{#blank#}5{#/blank#}, when her mother asks her what happens to her, she just says she feels like {#blank#}6{#/blank#}(cry).

    As a matter of fact, Lindsay is suffering {#blank#}7{#/blank#}clinical depression(临床抑郁症). What is clinical depression? It can be described as a mood which is so low that affects your everyday life{#blank#}8{#/blank#}(serious). The first sighs of it in teens are {#blank#}9{#/blank#}(poor) school reports than before, then learning difficulties and staying away from classmates and teachers. If you have these signs, don't worry. It is not so difficult to deal with clinical depression. There are many effective ways, such as medicine,{#blank#}10{#/blank#} (express) of feelings, more exercise and a balanced diet.

    A patent is an official document{#blank#}1{#/blank#}(give)to an inventor by a government. This document {#blank#}2{#/blank#}(general) gives inventors the right to stop anyone else from copying, using or selling the invention without their permission.

    Inventions are the result of hard work. It may only take a moment of inspiration to think of a good idea but it takes a lot of research and experimentation to turn it into a(n){#blank#}3{#/blank#} (use)and working invention. So, inventors deserve a reward for the amount of time they spend {#blank#}4{#/blank#}(develop)their ideas. They also need the {#blank#}5{#/blank#}(secure) of knowing that if they share the invention with {#blank#}6{#/blank#}rest of the world, nobody will steal it, use it or copy it without their permission.

    Patents also benefit the society {#blank#}7{#/blank#}return for patent protection. Inventors agree{#blank#}8{#/blank#}(show)all the technical information about their invention. This information is available to everyone and has enough details {#blank#}9{#/blank#}can be used by people with basic knowledge to produce the invention. In this way, patents help to spread new knowledge, which can in turn help people find {#blank#}10{#/blank#}(solve)to different problems or to make further advances in science and technology.

    At the beginning, written Chinese was a picture-based language. It dates back several thousand years to the use of animal bones and shells on which symbols {#blank#}1{#/blank#} (carve) by ancient Chinese people. Some of the ancient symbols can still be seen in today's hanzi.

    By the Shang Dynasty, these symbols {#blank#}2{#/blank#} (become) a well-developed writing system. Over the years, the system developed into different forms, as it was a time when people were divided geographically, {#blank#}3{#/blank#} (lead) to many varieties of dialects characters. This, {#blank#}4{#/blank#}, changed under the rule of Emperor Qinshihuang of the Qin Dynasty.

    Emperor Qinshihuang made the seven major states into one {#blank#}5{#/blank#}( unite) country where the Chinese writing system began to develop in one direction. That writing system was {#blank#}6{#/blank#} great importance in uniting the Chinese people and culture. Even today, no matter where Chinese people live or {#blank#}7{#/blank#} dialect they speak, they can all still communicate {#blank#}8{#/blank#} (easy) in writing.

    Written Chinese has also become an important means by {#blank#}9{#/blank#} China's present is connected with its past. People in modem times can read the classic {#blank#}10{#/blank#} (work) which were written by Chinese in ancient times. The high regard for the Chinese writing system can be seen in the development of Chinese characters as an art form, known as Chinese calligraphy, which has become an important part of Chinese culture.

    Today, Mount Qomolangma's peak is not a lonely place any more. Over 3500 people have{#blank#}1{#/blank#} (successful) climbed the mountain over the past years. Meanwhile, climbers have complained about{#blank#}2{#/blank#}(wait) for hours in the bottlenecks.

    In fact, the dangerous{#blank#}3{#/blank#}(crowd) aren't the only problem. All those climbers need {#blank#}4{#/blank#}(bring) a lot of gear (装置) and much of them ends up being left on the mountains becoming the world's{#blank#}5{#/blank#} (tall) rubbish dump.

    But the good news is{#blank#}6{#/blank#} some mountaineers are overtaking it to clean up Qomolangma. Mountaineers Paul and Eberhard are part of Eco Everest Expedition which has been cleaning up rubbish since 2008.So far they{#blank#}7{#/blank#}(collect)over 13 tons of garbage.

    Some of that rubbish is even being used for{#blank#}8{#/blank#} higher purpose. As part of the Mount Everest 8844 Art Project, a group of 15 artists Nepal collected 1.5 tons of garbage. They've changed the cans and oxygen tanks into74 piece of art that have are exhibited{#blank#}9{#/blank#}Nepal's capital. Part of the profit from sales{#blank#}10{#/blank#} (be) available for the Everest Pakeers Association which has helped ole rubbish of the mountain.

    Daisy is a girl who cares about our environment. She always longs to help {#blank#}1{#/blank#}(endanger) species of wildlife. One day, she {#blank#}2{#/blank#}(wake) up and found a flying carpet which took her to many{#blank#}3{#/blank#}(place) to experience something amazing. In Tibet, Daisy saw an antelope looking sad and it told her the species was being killed. Then the carpet showed her a place {#blank#}4{#/blank#}there was some wildlife protection. There she came across {#blank#}5{#/blank#}elephant, from whom she knew they used to be hunted {#blank#}6{#/blank#}mercy. But now good things are being done to save local wildlife. Knowing that, Daisy burst into {#blank#}7{#/blank#}(laugh) in relief. At the end of the journey, she met a monkey {#blank#}8{#/blank#}(rub) itself to protect himself from mosquitoes. The monkey asked her to pay {#blank#}9{#/blank#}(much) attention to the rainforest. Finally, Daisy {#blank#}10{#/blank#}(full) understood the meaning of no rainforest, no animals, no drugs.