参考答案:Sociolinguistics is the study of language in relation to social factors, that is, social class, educational level and type of education, age, sex, ethic origin, etc.
When we use the word()we mean that an idea or theory is being applied: that whatever the teacher does, certain theoretical principles are always borne in mind.
Most contributors to the Communicative Approach share the view that language is used for communication and are more concerned with meaning than with().