2 . 阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
Bees live in a well-organized society. They have a highly developed language 1 is different from those of other animals. They 2 (normal) pass important messages to each other about where 3 (find) food.
A searcher bee goes out looking 4 new food supplies. She returns home and 5 (give) her information to the worker bees there. The major way that bees communicate is by touch.This is how bees can tell which kind of flower the searcher bee has found. She then does 6 dance to give more information to the worker bees.
There are two 7 (type) of dance that tell about food: the “waggle” dance and the “circle” dance. The searcher bee does the circle dance when the food supply 8 (be) close to the home.In the dance, she moves in small circles to tell the worker bees that food is very near. However,the dance does not give 9 (they) any directions. It is 10 (amaze)that the clever bees still know where they can find the food.
