... interaction takes place. Simulation and role-playing are important techniques for creating a variety of social relationships and situations.I. 2. Students’ participation and interest I. 2. 1. ... are many different kinds of motivation such as integrative motivation, instrumental motivation, intrinsic motivation, extrinsic motivation, global motivation, situational motivation and so on. ... far from completion.I am also grateful to all the lecturers of the Post-graduate Department, Vietnam national University, Hanoi, College of Foreign Language for their guidance and enthusiasm...