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

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.

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.

Phonetics is different from phonology in that the latter studies the combinations of the sounds to convey meaning in communication.

The study of meaning in language is known as semantics.

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

Modern linguistics regards the written language as primary, not the written language.

P （）refers to the realization of langue in actual use.

Sociolinguistics is the study of language in relation to society.

Social changes can often bring about language changes.