Questions 1-4 refer to the following passage from a book about languages.

Studies have shown that language is not just about the words we use in certain sentence structures. The language that people use helps (1).... their sense of identity, especially if their nation is associated with that language. (2).... a different language from someone else may seem trivial, but sharing a language can unite groups of people and preserve a culture. A study (3).... how people felt about meeting someone speaking their language when they were traveling abroad. Unsurprisingly, the words used to describe this experience were "comfortable," "relaxing," and "relieving." Without a doubt, these people were (4).... Social linguists would like (5)... how much the sounds of a language have to do with the cultural similarity of those that speak it. These linguists need (6).... them further in order to find answers. If you (7).... a linguist, you will have a chance (8)... on these questions.