题目内容
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
D
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题目内容
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