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

A．On the freeway.
B．In the tunnel.
C．In McDonalds.
D．Downtown in traffic.

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During the recent economic down turn, South American countries have almost lost all their gains in the previous years of robust development.

单项选择题

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