单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．The boy’s mother has had an accident.
B．The boy’s mother doesn’t know of his condition.
C．The boy’s mother is in serious condition.
D．The boy’s mother has received the news.

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单项选择题

The post-exercise pulse rates of Group B were found on the average to have ______.

A．not changed
B．gone down 28 beats per minute
C．gone down 30 beats per minute
D．gone down 4 beats per minute

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

Questions 11 to 18 are based on the conversation you have just heard.