单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．She can hear them crying very loudly at the zoo.
B．She has heard them panting and was told it was laughter.
C．She has read about it from Darwin.
D．She used to work at a zoo.

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单项选择题

A．Almost two million.B．Almost three million.C．Almost five million.D．Almost six million.

A．Almost two million.
B．Almost three million.
C．Almost five million.
D．Almost six million.

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Questions 19 to 22 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

Questions 19 to 22 are based on the conversation you have just heard.