Thank you very much for your great help.  I will read your comments and edited manuscript, and if I have questiosn, I may email you today.

This paper will be published in "Educational Review" by Taylor and Francis, which is a major journal in the filed of Education. It will take a couple of months or more until it get printed, but I will let you know when it comes out. 

I have more projects and look forward to working with you soon .