<p>
It would not have been possible for me to finish this graduation thesis
without help and support from the kind people around me, to only some of
whom I can give particular mention here.
First and foremost, I am indebted to my supervisor, Ms. Pham Thi Thu
Hang for the continuous support of my thesis, for her patience, motivation,
enthusiasm, and immense knowledge. Throughout my thesis-writing period,
she provided encouragement, sound advice, good teaching, good company,
and lots of good ideas. I would have been lost without her.
It is difficult to overstate my gratitude to teachers in Foreign Languages
Department. They build the initial foundation of my knowledge and offer me
the opportunity to complete my graduation thesis.
In my work, I have been blessed with a stimulating and fun
environment in which to learn and grow provided by my many friends. My
sincere thanks go to them for helping me get through the difficult times, and
for all the emotional support, entertainment, and caring they provided.
Last but not least, to my family, I bid them hearty thanks. They have
been a solid anchor on which I rely again and again. Words cannot express
how grateful I am to be in their support and how much this work was
enhanced and made easier by them being in mine.
</p>
