They are very suprised at the news.为什么用at?

They are very suprised at the news.为什么用at? i'm very excited at the exciting news.为什么用at? We are very ____(surprise) at the _____(surprise) news. Look at the (羽毛）of my parrot.They are very nice.为什么用feathers I was very suprised at the way ( ) her spoke at the meeting They were very excited at the news.那位大虾帮忙分析at the news做何句子成分 be excited at the news 介词为什么用 at they were ( s ) at the bad news They were surprised at the news They were all （ ）at the ( ) news and they are very good at swimming in the 英语翻译Dear sirs:Frankly,we are greatly suprised at the price y