We consider that the written form of a natural language is the written record of the（）form.
A、written
B、practical
C、oral
D、grammatical
【正确答案】：C
【题目解析】：根据lt is generally agreed that the written form of a natural language is the written record of the oral form. “一般认为，一门自然语言的书写形式是该语言口语形式的记录”，故选C。
