假如你是李华，你的外籍教师Linda邀请你去参加她周日下午举办的生日聚会，可是你有事不能参加。请你给她写一封100词左右的电子邮件，说明原因并表达祝福。开头已写好，要点如下：
1. 感谢邀请，并表达歉意；
2. 原因：周六和父母一起去乡下看望生病的祖父，周日晚上才能返回家，很遗憾不能及时赶回参加她的生日聚会；
3. 生日礼物：汉英词典，托同学刘红给她带去；
4. 表达祝福。
Dear Linda,
Thank you for inviting me to your birthday party on Sunday afternoon.
Yours,
Li Hua
Dear Linda,
Thank you for inviting me to your birthday party on Sunday afternoon. I would like to go but I am afraid that I can’t make it .My grandpa ,who lives in the countryside , fell ill suddenly ,so my parents are taking me to see him on Saturday. We won’t come back home until Sunday evening. I’m terribly sorry about this, I know that you are learning Chinese, so I bought you a Chinese-English dictionary as a birthday present. I will ask Liu Hong to take it to you. I wish you a happy time at the party!
略