How men first learned to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that men,【B1】______animals, somehow invented certain【B2】______to express thoughts and feelings, actions and things,【B3】______they could communicate with each other; and that later they agreed 【B4】_______ certain signs, called letters, which could be 【B5】_______ to represent those sounds, and which could be 【B6】_______ down. Those sounds, whether spoken, 【B7】_______ written in letters, we call words. The power of words, then, lies in their【B8】______—the things they bring up before our minds. Words become 【B9】_______ with meaning for us by experience;【B10】______the longer we live, the more certain words【B11】______the happy and sad events of our past to us; and the more we read and【B12】______, the more the number of words that mean something to us【B13】______. Great writers are those who not only have great thoughts but also express these thoughts in words which appeal【B14】______to our minds and emotions. This【B15】______and telling use of words is what we call【B16】______style. Above all, the real poet is a master of【B17】______. He can convey his meaning in words which sing like music, and which【B18】______their position and association can【B19】______men to tears. We should, therefore, learn to choose our words carefully and use them accurately, or they will【B20】______our speech or writing silly and vulgar.【B13】