______ moves on a scale of the national language, dialects, and individual ways of communication.
A、LanguagechangeC
言语的变异总是以国语、方言以及不同的个体交际语言等形式来进行。从社会语言学的角度来看，一种言语变体无非是一种语言的方言变体而已。
Lyingundertheskull,thehumanbraincontainsanaverageoftenbillionnervecellscalled______.
Researchfindingshaveshownthatlanguageprocessingcentersaresituatedinasingleareaofthelefthemisphere.
The old couple have been married for 40 years and never once _______ with each other.
There is a growing body of evidence to support the fact that most people suffer from a lack of daydreaming _______ an excess of it.
Theoldcouplehavebeenmarriedfor40yearsandneveronce_______witheachother.
