此题要求改正所给文中的错误。对标有题号的每一行作出判断，如无错误，则在该行右边横线上面打一个（√）；如有错误（每行只有一个错误），则按下列情况改正：该行多一个词：把多余的词用斜线（

此题要求改正所给文中的错误。对标有题号的每一行作出判断，如无错误，则在该行右边横线上面打一个（√）；如有错误（每行只有一个错误），则按下列情况改正：该行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并且也用斜线划掉。该行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。该行错一个词：在错词的下面划一横线，在该行右边横线上写出改正后的词。
Good morning, everyone. Yesterday I received a letter from
a elderly gentleman. He told me the other day he saw                       【小题1】.     
that some student in our school uniform crowded onto a                   【小题2】     
bus without waiting their turns. On the bus they refuse                 【小题3】.     
to offer their seats for old people. What was worse, they                【小题4】     
even said dirty words to each other. I am very much sorry              【小题5】.     
for this. Today’s youth are tomorrow’s old people. Respect              【小题6】.     
the old and caring for the young is a fine tradition of our              【小题7】    
Chinese. Every one of us have the responsibility to keep it                【小题8】.     
up. I hope that you can learn something from this incident                【小题9】    
and you will have good manners whether you are inside or                 【小题10】.     
outside the school. Thank you.. a改为  an