A scientist 1 several monkeys in order to study animal psychology. He took a glass bottle, 2 its cork(瓶塞)and put two peanuts inside it. The peanuts dropped to the bottom and were easily seen from the outside. He then passed the bottle to a monkey, who shook it 3 for a long while and was able to get the peanuts when they 4 fell out. The scientist then put some peanuts into the bottle again 5 he had done before and showed the monkey that it only needed to turn the bottle upside down for the peanuts to drop out. 6 the monkey always ignored his 7. Each time it just shook the bottle frantically, with great 8 but without necessarily achieving 9 result.
Now the 10 is why the monkey was unable to understand the scientist instructs. 11 because all its attentions was focused on the peanuts. Instead, it must take its eyes off the peanuts and quickly 12 its attention to the 13 movement of the scientist and the way the bottle was turned upside down. To achieve this, it had to calm down and not be 14 by the impulse(诱惑) of its appetite. Yet the monkey was not able to understand this. It is the instance like this that reveals the monkey's some psychology is just like 15 of human beings.
