填空题

Ever since humans have (36) the earth, they have made use of various forms of communication. Generally, this (37) of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is (38) through sign language in which mo- tions stand for letters, words and ideas. (39) , the deaf, and the mute have had to resort to this form of (40) . Many of these (41) of whole words are very picturesque and exact and can be used internationally; spelling, however cannot. Body language, transmits ideas or thoughts by certain actions, either (42) or unintentionally. A wink can be a way of flirting or (43) that the party is only joking. (44) Other forms of nonlinguistic language can be found in Braille ( a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals. (45) . (46) .