[oopskevin]

Thank you so much, for your advice.
It's nice to hear that I havn't wasting my time recently, with your comments, I sense I have made progress, may be I just improved a little, but it actuated me so much.
For the part of punctuation, actually, I have been told for many times that I have to form a habit of leaving a space behind every comma, unfortunately, I always forgot, but now, I have taken it, and I will hold it for ever.

Well, I wish to have more comments from all of you right in the forum.
I would improve a great deal with your experience on Learning English.