邀请信
当邀请某位朋友参加活动，如郊游、宴会时，可以写一封邀请信，信的语气应该谦逊，热情。
Dear Mr. Clark:
We are wondering if you and Mrs. Clark want to have supper with us on Friday, January 21 st, at seven o'clock?
James and I are looking forward with great pleasure to seeing you and Mrs. Clark. We do hope you can Come.
Sincerely yours,
Lucy Wheeler
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