Sorry, I am late.

Today, I got in the office late again. The reason why I came late is that I was too tired since yesterday.

I went to swimming yesterday afternoon and arrived home at 8:30 PM. When I went to bed at 11:00 PM as usual, I just received a sms from an Italy friend. He would liked me to talk with him me. He is learning Chinese now. As a learning partner, I struggled got up and opened my laptop, talked with him for about one hour. After finished the talk/conversation, I went to bed ASAP.

In the that morning, I wake woke up by the clock at 7:00 o'clock AM, but I felt tired, so I turned off the clock, and have slep again a nap. but When I opened my eyes again, it was 8:00 AM already.
I got up asap, washed and ran out, when I got in the office, it is 9:00 AM. our punch lunch in time in is 8:30 AM, so I was late for half an hour.

Fortunately, we have two change chances for coming late per month, this is just my 2nd time. If I am late once again this month, my boss will deduct my salary, LOL......

Overall very good. Yang Fei. Next time, try to use past tense and don't mess up with present tense in the same paragraph or period of time.