单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now listen to the passage.
When the chimpanzee managed to get the food, which step it didn’t take

A．Got a tall box.
B．Climbed up the rope.
C．Grasped the pole.
D．Knocked down the food.

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单项选择题

单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.Now listen to the passage. When the chimpanzee managed to get the food, which step it didn’t take 您的浏览器不支持 audio 元素。