A-A+
When you are going to put out a fire you ____
问题详情
When you are going to put out a fire, you __________.
A.must be careful
B.should keep air away from it
C.must know it is dangerous
D.should cover it with water请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
B事实细节题。根据文章第三段的第九、十、十一句，氧气是助燃的，灭火要隔绝空气中的氧气，所以选B。
