第一节：短文改错（共10小题；每小题1分，满分10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（）,并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

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。

I first met Li Ming at a friend birthday party five years ago. Then I invited Li Ming over in my place. We listen to my CDs together and soon became best friends. Three years ago, Li Ming’s parents invited I to spend two wonderful week in Qingdao with them during the summer holiday. Li Ming and I loved walking along the beautifully beaches there. Last year I was ill but had to stay in hospital for a week. Li Ming came see me every day. Then his father has changed jobs and they moved to another city. Since then we haven’t see each other. but we’ve kept writing to each other.

透平密封蒸汽对汽轮机来讲有利于（）

A.保持真空度

B.外界空气进入

C.保护汽轮机轴承

D.冷凝液送出