A thousand years ago, Hong Kong was covered by a  1 forest. As more and more people came to live in Hong Kong, these trees were 2 and burnt. Now there are only a few forests left and we call these 3, a small area covered with trees.

    Elephants, tigers and many 4 animals were living in the thick forest. Early farmers needed fire to keep themselves 5 in winter, to cook their food and to keep away the dangerous animals. They 6 rice and kept pigs and chickens in the valleys. They cut down the trees and burnt them. Elephants quickly disappeared 7 there was not enough food for them. So did most of the wolves and tigers. Monkeys and many other animals soon 8 in the same way.

    There are about 36 different animals living in Hong Kong now. One of the most interesting of Hong Kong's 9 is the barking deer. In Hong Kong the barking deer has only a real enemy human beings. There are now not 10 barking deer left. So it is important for people to protect wild animals.

    The universe is really mystical(神秘的）.Scientists have done lots of study about it but there is still much they haven't discovered.

    Scientists think that there1life on the earth for hundreds of millions of years. However, we have not found life on any other planets2.

    There are eight planets going around the sun. The earth is one of them. There are humans, animals, and many other kinds of life on the earth. There is water and air, too. And compared to other planets, the earth is not too3or too cold. None of seven other planets has an environment like that of the earth.

    The sun and its planets are called the solar system, and our solar system is a small part of a4larger group of stars and planets, called the Galaxy or the Milky Way. There are5stars in the Galaxy, and our sun is only one of them.

    Scientists have also discovered many other galaxy in the universe. They are very far away and their light has to travel for many years to reach us. So 6is the universe? It is impossible to imagine.

    Scientists have sent spaceships to the planet Mars to7photos. They have even sent spaceships to travel outside 8 .However, no spaceship has traveled9to reach other stars in our Galaxy.

    When we see stars twinkling(闪耀）in the sky at night, we may think a lot:10so many stars in the universe, are we alone, or is there life out there in space? Have there been visitors to the earth from other planets? Why has no one communicated with us? We do not know the answer...

    Water is very important in our life. We drink it every day and1it to cook and wash things. We cannot live2water. But how can we save water?

    There are several ways to save water. Firstly， take shorter showers and don't leave the tap3when we don't need to use water.4 ， try to reuse water. It's the most important way for us to save water. At last， we should not5water so that we will have6water for years and years.

    To protect water is to7our life. Some people think there's much water8the Earth. In fact， there is only9water for us to use now. If we don't save it， it will surely be used out some day.

    So we should save water in order to save10. Do you think so?

    When talking about inventors, who do you first think of? Forget Thomas Edison. Meet the teenage 1 at the 24th Jiangsu Adolescents Science &. Technology Innovation Contest(江苏青少年科技创新大赛).

    Wang Xingyu, from Kunshan No. 2 Middle School, invented "a 2 line" in the zebra crossing. Wang often saw people running through

the red 3 , so he thought of an idea,

    "I 4 a spray tube(喷管) in the zebra crossing. When the light is red and 5 crosses, it sprays water. If the light is 6, it will not work," said Wang.

    But does it 7 water? "There's a water channel(槽) on the ground, so the water will be collected and 8 again," he said. Zong Hangchen, from Nantong Special Education Middle School, also got his invention idea from daily experience.

    Zong's 9 could only feel a little light. When he walked on the sidewalk for the blind, he often came across obstacles(障碍物). Once he 10 hurt his nose.

    11 help himself and the blind, Zong made something that has radar(雷达) and a loudspeaker. Users tie radar onto their knees and 12 the loudspeaker around their necks. When they meet obstacles, the radar will see them and the loudspeaker will make a 13 to tell the users.

    Chen Huijuan, an official from Jiangsu Association for Science and Technology, was 14 at these inventions.

    15 some ideas are simple, the creations are very good," she said. "Get inspiration( 灵感) from small things in life and you can be an, inventor, too.

    In 2016, three scientists from France, Britain and the Netherlands won the Nobel Prize in chemistry. They made the world's smallest machines, which are m {#blank#}1{#/blank#} thinner than hair.

    The invention will open a w {#blank#}2{#/blank#} new world for us. Here's an example. When we get sick, we go to the hospital and have lots of tests. The doctor needs to find out w {#blank#}3{#/blank#} we are sick. Thanks to the Nobel Prize winning research, doing that will be easier in the future. A doctor could put a tiny robot into our body. It could s {#blank#}4{#/blank#} for the illness and send the medicine right there.

    And the winner of the Nobel Prize in Medicine was from Japan. He also looks at small things. He has found that cells can break down the old ones and use the useful parts to make new cells. or f {#blank#}5{#/blank#} off viruses(病毒). How smart our body is！The Japanese scientist also gave some s {#blank#}6{#/blank#} to the young people, "Not all can be successful in science, but it's important to rise to the challenge."