问答题 Fires need oxygen(氧气). Without oxygen they will die. Cover a fire with water, sand, or sometimes with your coat. (Passage 3 )

【正确答案】火需要氧气。没有氧气火就要熄灭。用水,沙子,有时还要用衣服来盖住火(来灭火)。
【答案解析】