单项选择题

The writer seems to suggest that if you don't know much about first aid, you should（）

A．call for help from professionals
B．still try to help
C．stand by and not try to help
D．learn it from a doctor

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单项选择题
The most important thing in providing first aid is to（）

A．call for an ambulance
B．prevent bleeding
C．know what to do
D．act quickly
单项选择题
According to the passage, some injured or sick people died as a result of（）

A．other people's hesitation to offer first aid
B．unprofessional first aid
C．unnecessary first aid
D．unwise suggestion by by-standers
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