完形填空
In every cultivated language there are two great classes of words which, taken together, comprise the whole vocabulary. First, there are those words【C1】______which we become acquainted in daily conversation, which we learn, that is to say, from the【C2】______of our own family and from our familiar associates, and【C3】______we should know and use even if we could not read or write. They concern the common things of life, and are the stock-in-trade(惯做的事) of all who【C4】______the language. Such words may be called "popular" , since they belong to the people【C5】______and are not the exclusive possession of a limited class. On the other hand, our language【C6】______a multitude of words which are comparatively【C7】______used in ordinary conversation. Their meanings are known to every educated person, but there are few occasions to use them at home or in the marketplace. Our first acquaintance with them comes not from our mother' s lips or from the talk with our schoolmates,【C8】______from books that we read, lectures that we attend, or the more formal conversation of【C9】______educated speakers who are discussing some particular topic in a style appropriately elevated above the habitual level of everyday life. Such words are called "learned" , and the【C10】______between them and "popular" words is of great importance to a right understanding of the linguistic process.