______ 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。
The engineer ______ my father works is about 50 years old.
There is a deadlock(僵局) in the discussion when neither side gives ________ to the other.
Alinguistictheoryisconstructedaboutwhat______isandhowitworks.
―________ fine day it is today!
Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
