题目内容
（请给出正确答案）
[主观题]
The president promised to keep all the board members______ of how the negotiations were go
ing on.
A．inform
B．informing
C．be informed
D．informed
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闪燃——指在温度不高时，液面或固体毒面挥发尚少量的可燃蒸气与空气混合后遇火源而发生一闪即灭(延续时间少于())的燃烧现象
A.5s
B.8s
