We use language primarily as a means of communication with
other human beings. Each of us shares with the community in which we
live a store of words and meanings as well as agreeing conventions as __1__
to the way in which words should be arranged to convey a particular __2__
message: the English speaker has in his disposal a vocabulary and a __3__
set of grammatical rules which enables him to communicate his __4__
thoughts and feelings, in a variety of styles, to the other English __5__
speakers. His vocabulary, in particular, both that which he uses activetly
and that which he recognises, increases in size as he grows
old as a result of education and experience. __6__
But, whether the language store is relatively small or large, the system
remains no more than a psychological reality for tike inpidual, unless
he has a means of expressing it in terms able to be seen by another __7__
member of his linguistic community; he has to give the system a
concrete transmission form. We take it for granted two most __8__
common forms of transmission-by means of sounds produced by our
vocal organs (speech) or by visual signs (writing). And these are __9__
among most striking of human achievements. __10__

答案:
1. agreeing --------agreed

2. ∧words----------these/those words

3. in the disposal --------at the disposal

4. enables--------enable

5. delete “the” before “other English speakers”

6. old------ older

7. seen ------ perceived, understood, comprehended

8. delete “it” before “for granted”

9.　And ----- Yet; However

10.　∧most ------ the most striking