In the process of completing this research paper, I have received great deal of
helps, guidance and encouragements from teachers and friends.
First of all, I would like to express my deepest thank to my supervisor, Mr Mai
Van Sao (BA) who has offered me suggestion on how to shape the study and
always been most willing to give me valuable advice, helpful comments,
corrected my graduation paper as well as inspired me with his helpful advice
and ideas.
I also would like to express my sincere thanks to all teachers in the Department
of Foreign language, who have thoughtfully trained me in the last four years.
Finally, as always I wish to express my special thanks to my family, my friends
and my brother for their understanding and encouragement throughout the
preparation of this paper.