单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．It’s too broad to cope with.
B．It’s a bit outdate.
C．It’s controversial.
D．It’s of little practical value.

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单项选择题

单项选择题

Questions 23 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。