Based on human needs and the ways to meet the needs,Marx expounds that material intercourse is the basis of other kinds of intercourse and the social relation determined by the way of intercourse will decide the degree of individual development.

Based on the trend of the aging population and our nations particular service system for the aged, this paper presents such opinions as the public building disposition, environment design and the communication activity system of the residential belt meeting the requirement of the aging population, etc.

Habermas differentiates between communicative rationality and technical rationality,world to live in and system,communicative action and purposive action,communicative language and isolated language in his famous book-the theory of communicative action, and constructs his largest system of social theory of critique.

This essay says the Theory of Communicative Action of Habermas is only a philosophical hypothesis on the motive force of the development of society ,which is also a kind of the mild and gentle advice given for the capitalist society to help diagnose and cure its diseases and relax its conflicts only by means of theoretical fancy.

Habermas normative basic of the theory of communicative action is mutual interpretation between communicative action and lifeworld.

Teaching is the teaching of activity,it is the interaction and mutual development between teachers and students,between students,which is dominated in the course reform of basic education.

It s obvious that the traditional teaching method based on behaviorism can t accomplish both of the two aims while the interactive teaching approach, which is based on constructivism, humanism and social interactionism and has aroused the interest of many linguists is good enough to do this challenging task.