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.

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

Modern linguistics is mostly prescriptive, but sometimes descriptive.

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.

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

A diachronic study of language is the description of language at some point in time.

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

The discipline that studies the rules governing the formation of words into permissible sentences in languages is called s（）

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

Modern linguistics is different from traditional grammar.