l am sorry 一般怎么回答

　　例句：

　　Stewardss:Please wait a moment…l am sorry right now there is no vacant seat . I have to ask.

　　空姐：请稍等……抱歉，前面没有空座位了，我得去帮您问问。

　　l am sorry to hear that you are having trouble sleeping at night due to pressure.

　　听说你因为压力产生了睡眠问题，我很替你难过。

　　Many students are hurt because violent [vai? L? Nt] exercise, I am sorry to hear that, but I know They are in order to the class honors.

　　不少同学都因为剧烈的运动而受了伤，我听到那感觉很抱歉，但是我知道，他们都是为了班级的荣誉。