单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．They often take risks.
B．They’re too conservative.
C．They have no sense of security.
D．They have no self-discipline.

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单项选择题

Questions 19 to 21 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。