Question

20．Smokers in China are said to account for 45percents of the country's population．Most are young people and some are even middle school students．
Why do so many people enjoy smoke？Some consider it as a pleasure； some believe that it can refresh them．Others consider it as a relief from pressure．Besides，it does great harm not only to the smoker，but also to others around a smoker．Smoking waste much money and causes many diseases．What's bad，a lot of fires caused by careless smokers．
Nowadays，many people have realized the harmful of smoking and decide to give it up．If you are not a smoker，never to touch it and never start smoking．

Answer 1

分析 本文讲述了人们对吸烟的不同态度以及吸烟给人们带来的危害．

解答 Smokers in China are said to account for 45percents of the country's population．Most are young people and some are even middle school students．Why do so many people enjoy smoke？Some consider it as a pleasure； some believe that it can refresh them．Others consider it as a relief from pressure．Besides，it does great harm not only to the smoker，but also to others around asmoker．Smoking waste much money and causes many diseases．What's bad，a lot of fires∧caused by careless smokers．Nowadays，many people have realized the harmful of smoking and decide to give it up．If you are not a smoker，never to touch it and never start smoking．
详解：
1．percents改为percent；考查名词，percent没有复数形式，以它所修饰的名词来判断谓语的单复数．    
2．smoke改为smoking；考查非谓语动词，enjoy doing是固定搭配，意为"喜欢做某事"．
3．them改为themselves；考查反身代词，分析句意为"有些人认为吸烟能使他们自己消除疲劳"，故用themselves，与前面的some呼应．
4．Besides改为However；考查连词，结合语境分析句上下文之间为转折关系，故用however表示"然而"．
5．a改为the；考查冠词，此处smoker指代上一句中提到的smoker，故用the表示特指．
6．waste改为wastes；考查主谓一致，动名词形式smoking作主语，谓语动词用单数形式．
7．bad改为worse；考查固定搭配，what's worse 是固定搭配，意为"更糟糕的是"． 
8．caused前加are；考查动词的语态，主语a lot of fires和动词cause是动宾关系，故加系动词are构成被动语态．
9．harmful改为harm；考查名词，定冠词the后面跟名词形式，此处作动词realize的宾语．
10．去掉to；考查祈使句，这是一个否定祈使句，要用动词原形，故把to去掉．

点评 短文改错时要注意句子中人称和数是否一致，时态是否一致．各种词性之间的区别以及一些常用句型，固定短语的应用．这类题型一般考查的是基础知识，平时应注重积累，熟记一些句型及习惯常用结构．