Question

19．When I was a child，I hoped to live in the city．I think I would be happy there．
Now I am living in a city，but I miss my home in countryside．There the air is clean or the mountains are green．Unfortunately，on the development of industrialization，the environment has been polluted．Lots of studies have been shown that global warming has already become a very seriously problem．The airs we breathe in is getting dirtier and dirtier．Much rare animals are dying out．We must found ways to protect your environment．If we fail to do so，we'll live to regret it．

Answer 1

分析 作者小时候认为生活在城市很快乐，现在作者的愿望实现了，但作者又怀念农村的家乡，因为城市污染严重，全球变暖已经成为一个严重的问题，所以我们必须找到方法来保护我们的地球．

解答 When I was a child，I hoped to live in the city．I think I would be happy there．Now I am living in a city，but I miss my home in∧countryside．There the air is clean or the mountains are green．Unfortunately，on the development of industrialization，the environment has been polluted．Lots of studies have been shown that global warming has already become a very seriouslyproblem．The airs we breathe in is getting dirtier and dirtier．Much rare animals are dying out．We must found ways to protect your  environment．If we fail to do so，we'll live to regret it．
详解：
1．think改为thought；考查动词的时态，句意：我认为在在那儿很快乐．这里用一般过去时，表示"过去认为"
2．countryside前加the；考查冠词，句意：但是我想念农村的家乡．这里countryside是特指，故用定冠词the．
3．or改为and；考查连词，分析句意为"那里山绿并且空气新鲜"．前后句为并列关系，故用连词and．
4．on改为with；考查介词，with the development of是固定短语，意为"随着…的发展"．
5．been去掉；考查动词的语态，主语Lots of studies 与动词show为主动关系，这里不需要用被动语态．
6．seriously改为serious；考查形容词，此处用形容词作定语修饰名词．
7．airs改为air；考查名词，air为不可数名词，没有复数形式． 
8．Much改为Many；考查近义词辨析，名词animals为可数名词的复数形式，故用many修饰，much修饰不可数名词．   
9．found改为find；考查动词，情态动词must后接动词原形．
10．your改为our；考查形容词性物主代词，分析句意为"我们必须找到方法来保护我们的地球"．故用our．

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．