Đề luyện tập IELTS Task 1 thư thân mật

A friend of yours invited you to a home party he/she arranged. However, you have just missed this party. Now you want to apologise for not attending it. Write a letter to your friend to apologise. In your letter:- apologise to your friend- explain why you did not attend the party- say what you plan to do to make up for missing the party