A. WORKERS B. SPACEMAN C. ASTRONAUT D. FARMERS  EVER SINCE HUMA...

8. A. workers B. spaceman C. astronaut D. farmers  Ever since humans have inhabited the earth, they have made (1) _______ of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral (2)______. When there is a language (3)______, communication is accomplished through sign language in which motions (4) ______ for letters, words, and ideas. Tourists, the deaf, and the mutehave had to (5) ______ to this form of expression. Many of these symbols of whole words are very picturesque and exact and can be used internationally; spelling, however, cannot.Body language (6) ______ ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the party is only joking. A nod (7)______ approval, while shaking the head (8) ______ a negative reaction.Other form of nonlinguistic language can be (9) ______ in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals. Road maps and picture signs also guide, warn, and instruct people.(10) ______ verbalization is the most common form of language, other systems and techniques also express human thoughts and feelings.