4道歉信

假设你是李华，因弟弟生病住院不能参加Sarah下周四晚上的聚会，就请此给Sarah写一封道歉信。

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DearSarah,

I am terribly sorry to tell you that I am unable toattend your birthday party next Thursday evening. That is owing to（因为） the fact that （同位语从句）myyounger brother suddenly fell ill and was taken to a hospital this morning. Ihave to go there immediately and take care of him. As told by the doctor incharge, it will take around five days for him to recover and I have asked my boss fora leave.

I really regretthat I cannot go to celebrate your birthday personally and would miss theperfect chance of enjoying myself with all our old friends. I have chosen asmall gift for you and will send it to you tomorrow to show my best wishes.Besides, please give my regards to our friends when you meet them at the party.

Cordially,（sincerely）

LiHua