✔ 最佳答案
Dear sir / madam,
Due to personal matters, there is a short delay in submitting the filled "Credit Exemption Form, #" for my application to "Name of College".
Please accept my deep apology.
I am grateful if you would consider my application seriously.
Sincerely,
"Full Name"
"Application #, if any"
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Kindly replace appropriate words into " " for your letter
參考: Me, hope it helps your application. Good Luck !