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TOEFL
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Listening practice
/ Section JA4G
Listen to an Academic Talk
Listen to part of a talk in a biology class.
Listen
32. Why does the professor mention an “arms race”?
A
To show that host birds attack cuckoos
B
To compare cuckoos with other predators
C
To describe how cuckoos and host birds keep adapting to each other
D
To explain why cuckoos are aggressive