"Extinguish" is transitive, so for it to be grammatical we'd need " ... and, when the firehad been extinguished, ...". However, I also think (but I might be wrong, so you'd better double-check in the vocabulary section, if you wish) that they slightly differ in meaning. A fire is extinguished by somebody, but can go out without any extern
Ok, first of all I have to thank you for such exercises. They really help me I guess. But I would like to know the difference between ward off and avert. I am sure it is clear, but I dont get it:) Thanks Leni