6. I am looking forward to hearing from you soon.

5. I have to tell you something about the troubles I recently ran into.

4. It is hard to believe two years has passed since I left Beijing. How are you going on these days？

3. I’m writing this letter to apologize for my rude behaviors in the classroom yesterday.

2. I’m glad to receive your e-mail. Here is what I think about your problem.

1. How time flies！

6. FAQ = Frequently asked questions 常见问题

……

Keys：(One possible version)

实战演练

5. 　LOL = Laughing out loud 大声笑

4.　BTW = By the way 顺便说一句

3.　Bcc = Blind carbon copy.

暗送。如果你想发送邮件复本，又不想让原始接受人知道，就在暗送一栏中输入地址。