Translate the following into English with words or phrases given in brackets
幸运的是在发生爆炸时，碰巧房子里没有人。(happen)
【正确答案】：
LUCKILY, IT HAPPENED THAT THERE WAS NO PERSON IN THE HOUSE WHEN THE EXPLOSION TOOK PLACE.
【题目解析】：
碰巧 it happened that ···；在发生爆炸时when the explosion took place。