单项选择题According to Samantha Heller, people tend to eat milk chocolate because
单项选择题A linguist regards the changes in language and language use as ______.
单项选择题British ______ is one of the four major news agencies in the west.
单项选择题Modern linguistics, as against traditional grammar, is ______.
单项选择题Education in U. K. is compulsory for all between ages of______.