第3题: [单项选择]______ of second language acquisition was developed from the Halliday's theory of first language acquisition. A. Habit formation theory B. Discourse theory C. Monitor theory D. Cognitive theory 参考答案:B 答案解析:[解析] 话语交际说是由韩礼德的第一语言习得理论发展而来的,由哈奇于20世纪70年代后期提出。