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    7．If we know more about how to give first aid, we may help people in emergency. A．/; the B．the; an C．the;/ D./; an 【查看更多】

     

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    If we know more about how to give __________ first aid, we may help people in __________ emergency.

    A．/; the                         B．the; an                C．the;/                   D./; an

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