People thinking about the origin of language for the first time usually arrive at the conclusion that it developed gradually as a system of grunts, hisses and cries and【C1】______a very simple affair in the beginning.【C2】______, when we observe the language behaviour of【C3】______we regard as primitive cultures, we find it【C4】______complicated. It was believed that an Eskimo must have at the tip of his tongue a vocabulary of more than 10,000 words【C5】______to get along reasonably well, much larger than the active vocabulary of an average businessman who speaks English.【C6】______, these Eskimo words are far more highly inflected(词尾变化的)than【C7】______of any of the well-known European languages, for a【C8】______noun can be spoken or written in【C9】______hundred different forms, each【C10】______a precise meaning different from that of any other. The forms of the verbs are even more【C11】______The Eskimo language is, therefore, one of the most difficult in the world to learn,【C12】______the result that almost no traders or explorers have【C13】______tried to learn it. Consequently, there has grown up, in communication between Eskimos and whites, a jargon【C14】______to the pidgin English used in Old China, with a vocabulary of from 300 to 600 uninflected words. Most of them are derived from Eskimo but some are derived from English, Danish, Spanish, Hawaiian and other languages. It is this jargon that is usually【C15】______by travellers as " the Eskimo language".
单选题
【C1】
【正确答案】
B
【答案解析】本题考查情态动词。因为是人们思考出的内容，所以应为对语言的过去情况或状态的推测。must have been符合题意，故答案为B。
【答案解析】alike(相同的)常作表语；related和relevant后均可与介词to连用，意为“和……有关的”，不符合句意；be similar to表示“与……相似，类似于”，如：My newdress is similar to the one you have．(我的新衣服和你的那件相似。)因此，B项正确。