单项选择题

Questions 19 to 22 are based on the passage you have just heard. Why is there a hole in the weaverbird’s nest

A．To let in the sunshine.
B．To serve as its door.
C．To keep the nest cool.
D．For the bird to lay eggs.

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单项选择题

单项选择题

Questions 19 to 22 are based on the passage you have just heard. Why is there a hole in the weaverbird’s nest 您的浏览器不支持 audio 元素。