We use language primarily as a means of communication withother human beings. Each of us shares with the community inwhich we live a store of words and meanings as well as agreeing S1.______conventions as to the way in which words should be arranged to S2.______convey a particular message; the English speaker has in his dis- S3.______posal a vocabulary and a set of grammatical rules which enables S4.______him to communicate his thoughts and feelings, in a variety ofstyles, to the other English speakers. His vocabulary, in particular, S5.______both that which he uses actively and that which he recognises, in-creases in size as he grows old as a result of education and S6.______experience. But, whether the language store is relatively small or large, thesystem remains no more than a psychological reality for the indi-vidual , unless he has a means of expressing it in terms able to beseen by another member of his linguistic community; he has to give S7.______the system a concrete transmission form. We take it for granted the S8.______two most common forms of transmission—by means of sounds pro-duced by our vocal organs (speech) or by visual signs (writing). S9.______And these are among most striking of human achievements. S10.______