2. 다음 글의 요지로 가장 적절한 것은?
In both the ancient hunter-gatherer band and our intimate speech communities today, the diffusion of speech shaped values. The fact that everyone was going to be able to speak and listen had to be accommodated ethically, and it was via a rough egalitarianism. In terms of communications, people were equal and therefore it was believed they should be equal, or at least relatively so. By this code, ancient Big Men were not allowed to act controllingly and modern office managers are not allowed to silence anyone at will. Moreover, equal access to speech and hearing promoted the notion that property should be held in common, that goods and food in particular should be shared, and that everyone had a duty to take care of everyone else. This was probably more true among hunter-gatherers than it is in the modern family, circle of friends, or workplace. But even in these cases we believe that sharing and mutual aid are right and proper. Remember, if you bring something, you should bring enough for everyone.
5. 글의 흐름으로 보아, 주어진 문장이 들어가기에 가장 적절한 곳을 고르시오.
When the team painted fireflies’ light organs dark, a new set of bats took twice as long to learn to avoid them.
Fireflies don’t just light up their behinds to attract mates, they also glow to tell bats not to eat them. This twist in the tale of the trait that gives fireflies their name was discovered by Jesse Barber and his colleagues. The glow’s warning role benefits both fireflies and bats, because these insects taste disgusting to the mammals. ( ① ) When swallowed, chemicals released by fireflies cause bats to throw them back up. ( ② ) The team placed eight bats in a dark room with three or four fireflies plus three times as many tasty insects, including beetles and moths, for four days. ( ③ ) During the first night, all the bats captured at least one firefly. ( ④ ) But by the fourth night, most bats had learned to avoid fireflies and catch all the other prey instead. ( ⑤ ) It had long been thought that firefly bioluminescence mainly acted as a mating signal, but the new finding explains why firefly larvae also glow despite being immature for mating.