阅读理解。 There are varieties of bee in the world. Scientists are interested in honeybees because of the 'language' they use to communicate with each other. Karl von Frisch, a professor from Austria, devoted many years of his life to researching the ways honey-bees communicate in their hives (蜂房). Karl von Frisch built special hives, a glass wall and painted some honey-bees with different colors. A marked bee which returned to the hive from the feeding table performed a dance on the surface of the honeycomb (蜂巢). First it made a circle to the right, then to the left. It repeated these circles again and again. The surrounding bees copied its dances and then they left for the feeding place. Karl von Frisch set up two feeding places. One was close to the hive the other was farther away. The bees that had been at the nearby feeding place were doing the circling dance. The bees at the distant feeding place were dancing differently. The dancer ran in a straight line, wagging (摇摆) from side to side. Then it turned in a semicircle (半圆), ran straight again, and turned in another semicircle to the opposite side. It repeated the dance over and over. The dances convey messages about the far-away feeding place. Karl von Frisch and his assistants slowly moved a feeding place close to the hive farther and farther away and they counted how many times the bees repeated the dance in one minute. Finally they found out the number of wagging dances per minute told the exact distance to the feeding place. 1. Scientists are interested in honeybees just because _____. [     ] A. The honey-bees have bright colors. B. The honey-bees enjoy a strange way of communication. C. The honeydew is delicious. D. there are several kinds of bees in the world. 2. Professor Karl von Frisch was from _____. [     ] A. America B. Australia C. Sweden D. Austria 3. What information does the dance convey? [     ] A. There is no feeding place around. B. The feeding place is farther away. C. The feeding place is too far for the bees to get to. D. The feeding place is near the hive. 4. What did Karl von Frisch want to find out while moving a feeding place close to the hive farther and farther away? [     ] A. How the bees continued their dances. B. How the bees communicated the distance to the feeding place. C. The differences between the circling dance and the wagging dance. D. How the bees flew to the feeding place.