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Upon receiving your letter, I know that you can not attend my graduation gathering. Although it was unfortunate, but you are, so it does not happen because relations. I am very happy to Saturday into your house at night to go to, and tell you about the gathering.

Receives your incoming letter, I had known you cannot attend my graduation meeting.Although very regrettable, but you are because has the matter, therefore has not related.I am glad Saturday evening to go very much to your family, and tells you the related meeting the situation.

Receipt of your letter, I knew you could not attend the graduation party. Although very regrettable, but because you are a problem, so it doesn't matter. I would be happy to you at home on Saturday night, and tell you the circumstances of the parties.