单项选择题


Questions 17-20 are based on the following dialogue. You now have 20 seconds to read Questions 17-20.
What topic did the essay question cover

A．Rainforest tribes in Brazil.
B．Mountain tribes in Chile.
C．Incas in Peru.
D．Cities of Colombia.
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单项选择题
Why did the professor put the food in a small box
A．To give the monkey a surprise.
B．To see how the monkey ate from a box.
C．To see how soon the monkey could find it.
D．To find out how the monkey would open the box.
填空题
Dial.
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