单项选择题 The way in which people address each other depends on their age, sex, social group and personal relationship. The English system of address forms frequently used includes first name, last name, title+last name, （）, and kin term.

单项选择题 The term （） linguistics may be defined as a way of referring to the approach which studies language change over various periods of time and at various historical stages.

单项选择题 According to Searle，those illocutionary acts whose point is to commit the speaker to some future course of action are called （）.