单项选择题

Questions 19 to 21 are bused 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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单项选择题
A. By creating chances of teamwork. B. By supporting people in war areas. C. By collecting money for children. D. By teaching children speed skating.
A. By creating chances of teamwork. B. By supporting people in war areas.
C. By collecting money for children. D. By teaching children speed skating.
单项选择题
Chest compression shouldn’t be applied unless ______.
A. the victim is still unconscious after the airway clearance
B. you cannot feel pulse after mouth-to-mouth breathing
C. you have prepared yourself in advance to do it properly
D. all of the above
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