第21题: [单项选择]The type of language which is selected as appropriate to a particular type of situation is called A. variety. B. dialect. C. slang. D. register. 参考答案:D 答案解析:[解析] 本题考查的是语言学知识。(适合特定场合使用的)语体风格或语域被称为register,因此正确答案应为选项D。选项A意为“语言变体”,指的是一种语言的各种方言,或一种方言中某一项语音、词汇或句