How are you doing? You asked me in your last letter about my plan for the coming summer vacation. I am sorry that I didn’t reply without delay. How I wish I would read and reply your email as soon as I received it. However, I was busy preparing for my final exam at that time, which is vital for me. As a result, I had no choice but to completely focus on my study, for which I am very sorry. I hope you can understand me.