Sociolinguistics is the study of language in relation to society.

Findings in linguistic studies can often be applied to the settlement of some practical problems. The study of such applications is generally known as a（）linguistics.

Pragmatics is different from semantics in that pragmatics studies meaning not in isolation, but in context.

The distinction between competence and performance was proposed by F. de Saussure.

Langue refers to the a（）linguistic system shared by all the members of a speech community while the parole is the concrete use of the conventions and application of the rules.

Morphology studies how words can be formed to produce meaningful sentences.

Language is a system of a（）vocal symbols used for human communication.

Morphology

In the study of linguistics, hypotheses formed should be based on language facts and checked against the observed facts.

Phonology