单项选择题

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

A．It is the same every year.
B．A mark over 70% will pass.
C．It is the same for every exam.
D．A mark over 60% will pass.

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Do not go beyond ______ unless you are certain that the victim has no pulse.

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。