Fill in each of the 15 blanks in the passage with the most likely answer. Blacken the letter corresponding to your choice on the ANSWER SHEET.
Scientists have wondered if animals actually have language. It seems clear to anyone who has a dog or cat or who （1） observes animals that there is certainly communication going on. Recent research into different animals is shedding light （2） animal communication.
Many animals produce chemicals which send "smell-messages" to other animals of the same （3）. A honeybee, for example, makes over thirty-six different chemicals to communicate （4） information as where to find good flowers. An ant that has found food will take a bit of it and, as it heads back to the anthill, leaves a chemical （5） so that other ants will know where to go for more food. Animals also communicate with （6） language. A dog expresses happiness by wagging its tail, （7） most people know. A honeybee uses a complex "dance" to give other bees the （8） direction to flowers. Like humans, many animals （9）, but we are only beginning to understand the meaning of these sounds. A professor has spent over ten years studying prairie dogs （10） He carefully records their sounds and observes their （11） and all events that happen at the same time as the sounds. The professor claims that he has （12） about fifty "words", with which prairie dogs alert each other when they （13） danger.
It is clear that animals certainly communicate in various ways. However, the question "Is it language?" is still （14）. Some people think it is. The famous linguist Noam Chomsky, however, believed that what （15） communication from true language is syntax——that is, the use of grammar and word order, so he believed that only humans can have language.
第3题
A、type
B、origin
C、ancestor
D、species
【正确答案】：D
【题目解析】：species表示“（动植物的）物种”，用在此处表示把气味信息传递给同一物种的其他动物，D选项符合语境。type：类型，种类；origin：起源，出身；ancestor：祖先。species表示“种类”时，指一群动物或植物，它们的成员是相似的，它们可以一起繁殖，生育年轻的动物或植物；type表示“种类”时，指一组人或事物，他们具有相似的特征或特质。