精选优质文档-倾情为你奉上2010年英语专业四级真题完形填空及答案解析PART III CLOZE15 MINDecide which of the choices given below would best complete the passage if inserted in the corresponding blanks. Mark the best choice for each blank on Answer Sheet Two.How men first learned to invent words is unknown; (31) , the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain (32) to express thoughts and feelings, actions and things, (33) they c