单选题
________a language family is a group of languages with a common origin and similar vocabulary, grammar, and sound system.
A、
What linguists call
B、
It is called by linguists
C、
Linguists call it
D、
What do linguists call
【正确答案】
A
【答案解析】
语法应用。本句是用名词性从句What do linguists call a language family作主语；意思是语言学家将一组有着共同起源，类似词汇、语法及音系的语言称为语系。
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