A.sociological…psychologicalB.psychological…sociologica……

单项选择题A historical study of language is a （）study of language.

A.synchronic
B.diachronic
C.prescriptive
D.comparative

单项选择题In modern linguistics, speech is regarded as more basic than writing, because （）

A.in linguistic evolution, speech is prior to writing
B.speech plays a greater role than writing in terms of the amount of information conveyed
C.speech is always the way in which every native speaker acquires his mother tongue
D.All of the above