翻译是：
What worried us was that Mary fell ill suddenly.
fall ill：生病 suddenly：突然地 worry sb：使某人担心还有一题 不久，消防队员就到了，扑灭了大火。（before）Before long,the firefighters came and put out the big fire.before long：不久 firefighter：消防员 put out：扑灭祝你开心望采纳谢谢