The prehistoric （ ） parent language is thought to be a highly in

The prehistoric （ ） parent language is thought to be a highly inflected language, which English originated from.
A、Prussian
B、​Indo-European
C、Czech
D、Russian
【正确答案】：B
【题目解析】：史前​印欧语母语言被认为是一种具有高度屈折性的语言，它是英语的起源。