（）is the study of second and foreign language teaching and learning.

Psycholinguistics is the study of the mental processes ...

填空题Psycholinguistics is the study of the mental processes that a person uses in producing and understanding language, and how humans learn （）.

Linguistics is the study of language as a system of hum...

填空题Linguistics is the study of language as a system of human （）.

Language teaching involves three main disciplines. They...

填空题Language teaching involves three main disciplines. They are linguistics, psychology and（）.