单项选择题The price drop of crude oil is beneficial in that it
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 ______.