Write a letter of apology. You made an appointment with Richard to go to a concert together, but you lost the tickets. Write a letter to Richard to express your apology and invite him to go to a concert next time.
You should write approximately 100 words. Do not sign your own name at the end of your letter. Use "John" instead. You do not need to write the address.
【参考答案】
[参考范文]Dear Richard, I’m sorry to tell you that we couldn’t ......