The world has about 3000 languages, which can be grouped into roughly 300 language families on the basis ofsimilarities in their basic word stock and______.
A、grammar
B、construction
C、pronunciation
D、notion
【正确答案】：A
【题目解析】：世界上有3000多种语言，大概有300个语族，每个语族共有的特点是基本词汇相似和语法相似。