请阅读 Passage 2,完成第 26 ~ 30小题。

                                                                                Passage 2

  Of all systems of symbols,language is the most highly developed. It has been pointed out chat human beings,by agreement,can make anything stand for anything. Human beings have agreed,in the course of centuries of mutual dependency,to let the various noises that they can produce with their lungs,throats,tongues,teeth,and lips systematically stand for certain happenings in their nervous systems. We call that system of agreements language.There is no necessary connection between the symbol and that which it stands for. Just as social positions can be symbolized by feathers worn on the head, by gold on the watch chain, or by a thousand other things according to the culture we live in,so the fact of being hungry can be symbolized by a thousand different noises according to the culture we live in.  However obvious these facts may appear at first glance,they are actually not 80 0bvious as they seem except when we take special pains to think about the subject. Symbols and the thing8 they stand for are independent of each other,yet we all have a way of feeling as if,and sometimes acting as if,there were necessary connections. F'or example,there are people who feel that foreign languages are' unreasonable by nature;foreigners have such funny names for things,and why can't they call things by their right names? This feeling exhibits itself'most strongly in those English and American tourista who seem to believe that they can make the natives of any country understand English if they shout loud enough. Like the little boy who is reported to have said:" Pigs are called pigs because they are such dirty animals," they feel that the symhol is inherently connected in some way with the things symbolized.