根据短文内容选择最佳答案。

　　When you are feeling unhappy or forget how great you are, there are six ways to make you feel good about yourself．

　　1)Look in the mirror and say to yourself．“I'm a special person and there's no one in the world like me．I can do anything!”It may not sound so good, but it really works!

　　2)Do something nice for someone．helping others always makes you feel good．

　　3)Smile! Be friendly to people you meet．Look for the good things in your friends and family．

　　4)Learn something new! Have you always wanted to decorate your own room or learn how to swim? Go for it! New challenges(挑战)are fun and give you a sense of accomplishment when you have finished．

　　5)Read and start a diary．Turn off the TV and let your imagination(想象力)fly! Write down your thoughts, dreams or anything you want! Writing always helps to express your feelings．

　　6)Stay with your family．We all need our family time．Talk with your Mum or Dad or maybe even your cousin．

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根据短文内容选择可以填入空白处的最佳答案。(Choose the best answers to complete the passage．)

　　Pollution means contaminating the Earth's environment with materials that people's 　　1　　 and lower their quality of life．Pollution can also 　　2　　 animals and plants．　　3　　 many different forms of pollutions．The three 　　4　　 are air pollution, land and water pollution．

　　Air pollution comes from different sources－not 　　5　　 of them are man-made．For example, dust storms in deserts and the smoke from forest fires are natural sources of air pollution．In urban areas, dirty air is more noticeable 　　6　　 the fumes from traffic and the waste from factories．Air pollution can 　　7　　 humans by causing sore eyes and respiratory 　　8　　, especially in children and the elderly．

　　Land pollution is caused by the deposit of soil waste that can't 　　9　　 quickly or at all．Land pollution can affect the lives of animals and plants, and it makes the environment look very 　　10　　 Recycling and reusing materials can help 　　11　　 the amount of land pollution．Other methods include landfill－using the rubbish to make new land－and burning the rubbish, 　　12　　 these two methods can pollute the water and air．

　　Water pollution results when substances are released into lakes, rivers, oceans, ect．Stay in the water or 　　13　　 at the bottom．This form of pollution may also begin in the air if the air is polluted and cause acid rain．When it 　　14　　, the rain will then pollute the water in lakes, rivers, oceans, ect．Soil erosion is one example of natural water pollution and can cause problems 　　15　　 the soil blocks the flow and leads to flooding．Pollution from human sources includes chemicals, pesticides, waste from factories and human sewage．

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阅读下面短文，然后根据短文内容选择最佳答案。

　　Everyone tries to get to school on time．But when bad weather gives you trouble, can you still make it before the bell rings?

　　In northern China during spring, big sandstorms often make trouble for students and everyone else．

　　‘When we had a sandstorm last week, I had to get up half an hour earlier so I wouldn't be late for school,’said Xing Wei, a Junior 1 boy at Yaohua Middle School in Tianjin．

　　Xing usually gets up at about seven and needs 20 minutes to get to school．But on sandstorm day, he needs 40 minutes．When the sky is dark with sand, buses and cars all move much more slowly．Sometimes, people can't even see for 200 metres．

　　Sandstorms usually happen in spring．This year, sandstorms started in late Match．They have happened in more than 10 provinces in northern China this year．More than 70 million people have had problems in those places because of the storms．

　　People in southern China don't have to worry about this kind of bad weather．Most of the sand comes from Gansu and Inner Mongolia．In northern China, lots of places have few trees and don't get much rain．People there have been cutting down too many trees．When there aren't many trees, the ground can't keep enough water．Over the years, the ground becomes looser．Strong winds take the loose sand into the sky．

　　Sandstorms are bad for people's health．If people breathe too much sand, they could cough or have asthma(哮喘)．

　　Sandstorms also give farmers lots of problems．Sometimes their sheep get lost in the storms and never get back home．The winds also tear farmers' houses down．

　　What can you do to stop sandstorms? Here's an idea：Ask your parents to help you plant some trees this spring．

　　If you see people cutting down too many trees, tell them about the danger of sandstorm, and ask your government to stop them from cutting．

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