单项选择题

A．In November or December．
B．In September or October．
C．Certainly in November．
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单项选择题
This passage is mainly about________.
A．how to save people out of the water
B．how to give first aid to people who are drowning
C．how to mouth-to-mouth breathing
D．how to save a child from a river
单项选择题
If the drowning boy has no pulse, _______
A．pressing his chin upwards is enough to get him breathing
B．blowing air into his mouth is sure to save his life
C．pressing his nostrils together with your fingers can work
D．pressing is the last chance of saving his life
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