For the motivation study in SLA, please give the major theory/model in the three stages respectively. 1)     The first stage, ___2)     The second stage, __3)     The third stage, ______ 答案: (以下答案任选其一都对)1) socio-educational model 2) self-determination theory 3) L2 motivational self-system; socio-educational model self-determination theory second language motivational self system; socio-educational model, self-determination theory, L2 motivational self system; Socio-educational Model, Self-determination theory, L2 Motivational Self System3 Psychological Aspects of Learners Test for Unit 3