【正确答案】 B

【答案解析】[听力原文]29-31
A university professor recently made several experiments with different animals to find out which was the most intelligent.
He found out that the monkey was more intelligent than other animals.
In one experiment the professor put a monkey in a room where there are several small boxes. Some boxes were inside other boxes. One small box had some food inside of it. The professor wanted to watch the monkey and to find out how long it would take the monkey to find the food. The professor left the room. He waited a few minutes outside the door. Then he knelt down and put his eye to the keyhole. What did he see? To his surprise he found himself looking directly into the eye of the monkey. The monkey was looking at the professor through the keyhole on the other side of the door.
29. What was the purpose of the professor's experiments?

主题判断题。关键词to find out which was the most intelligent说明教授实验的目的是找出最聪明的动物，只有B与之吻合。

【正确答案】 C

【答案解析】[听力原文]
Why did the professor put the food in a small box?

因果关系判断题。教授把食物放到小盒子里的目的是看猴子用多长时间能找到食物。(to find out how long it would take the monkey to find the food．)

【正确答案】 A

【答案解析】[听力原文]
How did the professor watch the monkey?

细节题。关键词put his eye to the keyhole。