During the process of doing this paper, I have received the useful help
from my teachers, my colleagues, my friends and my family.
First of all, I would like to gratefully and sincerely thank Mrs. Dang
Thi Van, MA for her assistance, guidance, understanding and especially her
patience. Without her help, my graduation paper would have never been
successfully fulfilled.
Besides, my deep thank is also extended to all the teachers in
Department of Foreign Languages for their lectures supporting this study and
all the students of NA1601 who enthusiastically help me complete the survey
questionnaires.
Last but not least, I am grateful to my family and all of my friends for
always standing by, supporting and encouraging me. The completion and
success of my graduation paper would not be achieved without their help.