下面短文中有10处语言错误，请在有错误的地方增加、删除或修改某个单词．增加：在缺词处加一个漏词符号（λ），并在其下面写上该加的词．删除：把多余的词用斜线（\）划掉．修改：

Question

下面短文中有10处语言错误，请在有错误的地方增加、删除或修改某个单词．
增加：在缺词处加一个漏词符号（λ），并在其下面写上该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写上修改后的词．
注意：1．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分．As is known to all，with the improvement of people living standards，cars have become a popular mean of transport，bringing great convenience to our lives．However，they have also  cause some problems such as air pollution and traffic jams．When can we solve the problems then？As far as I  concerned，riding bicycles is a good solution．For one thing，bicycles don't need any petrol and they are energy-saving．For another，bicycles are environmentally friend because it won't give off waste gas．What's the more，riding bicycles is good to our health．
So my friends，let's go to work through riding bicycles．Come on and join us!

Answer 1

As is known to all，with the improvement of people living standards，cars have become a popular mean of transport，
                                                                  people's                                                               means/way
bringing great convenience to our lives．However，they have also cause some problems such as air pollution and traffic
                                                 life                                          caused
jams．When can we solve the problems then？As far as I∧concerned，riding bicycles is a good solution．For one thing，
          How                                                                  am
bicycles don't need any petrol and they are energy-saving．For another，bicycles are environmentally friend because 
                                                                                                                                                      friendly
it won't give off waste gas．What's the more，riding bicycles is good to our health．
they                                               去掉the
So my friends，let's go to work throughriding bicycles．Come on and join us!
                                                   by
1．people改为people's；考查名词所有格，这里名词所有格作后面 的living standards的定语．
2．mean改为means或者way；考查名词，mean意为"意味着"，means/way意为"方式，手段"根据句意"汽车已经成为一种流行的
      交通方式"得知此处应该用means或way．
3．lives改为life；考查名词，这里life泛指一般意义上的生活，为不可数名词．
4．cause改为caused；考查时态，这里过去分词caused和前面的have构成现在完成时，说明汽车已经导致了一些问题．
5．When改为How；考查疑问词的用法．when提问时间，how提问方式，根据句意"我们应该怎样解决这些问题呢"得知此处应用When．
6．I后加系动词am；考查固定短语，as far as I am concerned是一个固定搭配，意为"就我个人而言"．
7．friend改为friendly；考查形容词，这里friendly与前面的系动词are构成系表结构．
8．it改为them；考查人称代词，这里指代的是上文中的bicycles，所以用复数形式．
9．去掉the；考查固定短语，what's more 是固定短语，意为"而且"表示递进，所以这里要去掉the．
10．through改为by；考查介词，through指"通过…途径"，by指"用…方式"，所以这里用by．