In every cultivated language there are two great classes of words which, taken together, c

omprise the whole vocabulary. Firstly, there are those words【1】which we become acquainted in daily conversation, which we【2】, that is to say, from the members of our own family and from our familiar associates, and【3】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 of all who【4】the language. Such words may be called "popular", since they belong to the people at large and are not the exclusive possession of a limited class.

On the other hand, our language【5】a multitude of words which are comparatively seldom used in ordinary conversation. Their meanings are known to every educated person, but there is little【6】to use them at home or in the marketplace. Our first acquaintance with them comes not from our mother's【7】or from the talk of our schoolmates, but from books that we read, lectures that we【8】, or the more formal conversation of highly educated speakers who are discussing some particular【9】in style. appropriately elevated above the habitual level of everyday life. Such words are called "learned", and the【10】between them and "popular" words is of great importance to a right understanding of linguistic process.

(11)

A．by

B．with

C．through

D．at