第12题: [单项选择]It is taken as a great contribution made by ______ that languages in the world are classified into different language families according to their genetic relations. A. modem linguists B. traditional grammarians C. sociolinguists D. historical linguists 参考答案:D 答案解析:历史语言学根据各种语言的起源关系讲世界上的语言划分为不同的语系。