假设你是李华，你和外国朋友Tom约好这个周五晚上去体育馆看足球赛，但你因故不能赴约。请根据以下要点用英语给他写一封电子邮件：

1.表示歉意；

2.解释原因；

3.另约时间

注意：

1. 词数100左右；

2.可以适当增加细节，以使行文连贯

【范文】

Dear Tom,

I’m so sorry to say that I can't go towatch the football match with you as scheduled this Friday night. Thisafternoon, I suddenly received the news that my grandfather fell down and brokehis left leg. Since my father is on a business trip and won’t come back nextMonday; my mother needs to look after my little sister at home, so I have totake the responsibility of taking care of my grandfather in the hospital thesenights.

I have heard that there will be a matchwhich is more exciting next Friday night. I wonder whether you are availablethen. If you are free, we can make an appointment to watch that footballmatch.                                                                                                    

Yours,

Li Hua

亲爱的汤姆,

我很抱歉不能和你一起去看足球比赛了，原定于这个星期五晚上。今天下午，我突然接到消息:我爷爷摔倒了，摔断了左腿。因为我爸爸出差了，下周一不会回来了;我妈妈需要在家里照顾我的小妹妹，所以这些晚上我不得不负起照顾在医院里的爷爷的责任。

我听说下周五晚上有一场更精彩的比赛。我想知道你那时是否有空。如果你有空，我们可以约个时间去看那场足球赛。

你的,

李华