下表为我国某区域1999年主要土地覆被类型的面积。右下图示意该区域1999～2007年土地覆被类型面积变化率，正值表示增长，负值表示减少。该区域生态环境已呈退化趋势。据此完成下面小题。
改善该区域生态环境首先应
A．治理盐碱地
B．退耕还草
C．保护沼泽地
D．植树造林
答案：B
题目分析：
由材料可知，土地覆被类型面积变化率，正值表示增长，负值表示减少。读该区域1999～2007年土地覆被类型面积变化率示意图可以判断，该区域生态环境已呈退化趋势，主要表现为耕地增加，草地减少，沙地面积增加。因此改善该区域生态环境首先应退耕还草，B对。盐碱地、减少，不必放在首位，A错。沼泽地减少幅度小，不如草地减少的严重，也不必放在首位，C错。图示没有林地，说明该地可能降水少，不适宜发展森林，D错。
阅读短文，根据短文内容完成下列图表，每空一词。 Let me offer you some useful advice. You probably think you will never be a top student. Anyone can become a better student if he or she wants .Here is how to plan your time carefully. Make a list of things that you have to do. After making the list. you should make a schedule(时刻表) of your time. First arrange your time for eating, sleeping, dressing, etc. Then decide a good regular time for studying. Don’t forget to spare some time for your hobbies. Find a good place to study Look around the house for a good study area. It may be a desk, a corner of your room, free of everything but study things. Make good use of your time in class Listen to everything the teacher says. Taking notes will help you remember what the teacher says. Study regularly（规律地） When you get home from school, go over your notes. Reviewing(复习) the important prints will help you understand the next class. Never give up if you don’t pass a test The purpose of a test is to show what you’ve learned from a book or a subject; It helps you remember our new knowledge. Don’t be too worried. The world won’t remember our new knowledge. Don’t be too worried. The world won’t end if you don’t pass a test Title: To be a 1 student
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