To fulfill this assignment, I have received a lot of helps from supervisors,
family and friends. First of all, I would like to show my sincere thanks to my
supervisor Mrs Nguyen Quynh Chi M.A who supports me with useful advices,
valuable guide to finish this study.
My thanks also go to all of teachers in Foreign Language Department of
Hai Phong Private University, providing materials for this study and having
taught me through four years at university .
Finally, I want to thank my parents who always stand by and support
me both materially and mentally. This study would not have been completed
without their whole-hearted helps. For my young experience and knowledge, I
would like to received more useful comments from teachers and others.