一封英语邮件dear( )thank you for your email.i am very happy during

tom@sina.com
Dear Tom ,
thank you for your email.I am very happy during the summer holiday.
I ( done a lot of intresting things . For example ,I went to shanghai to visit the EXPO ,I learned how to swim .The most intresting thing is cooking. In a word ,I have a meaningful holiday. )
what about yours?I am waiting for you.
yours.