In his research of the theory of systemic linguistics, Halliday made outstanding achievements in the study of ______.

By the end of the 1960s, the Audiolingual Method became the target of criticism from all sides. However, its contributions to language teaching must not be ignoreD.Please briefly write out　　the 5 aspects of its contributions.

In Chomsky’s idea, a native speaker of a language is said to be equipped with linguistic competence. So what is he supposed to be able to do?

In the Oral Approach, what is the teacher required to be? And how does he or she help the students to build up correct language habits?

For what purposes does a Grammar-translation teacher employ translation in teaching a foreign language?

What are the objectives of the Direct Method?

What is the role of the teacher in the Total Physical Response?

According to Morrow, what are the features of real communicative activities?

How is the Natural Approach towards the learners’error?