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.

Morphology

General linguistics is generally the study of language as a whole.

Pragmatics

Syntax is different from morphology in that the former not only studies the morphemes, but also the combination of morphemes into words and words into sentences.

A scientific study of language is based on what the linguist thinks.

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

Modern linguistics is mostly prescriptive, but sometimes descriptive.

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

D（）is one of the design features of human language which refers to the phenomenon that language consists of two levels: a lower level of meaningless individual sounds and a higher level of meaningful units.