Sentence 1Wrong sentence Mistake Why
The firemen arrived in the scene of the fire and rescued them.arrived inarrive in后面一般加较大的地方，如国家，省份， 城市等。arrive at后面一般加较小的地方，如车站、 机场、村庄、学校等。若后面没有地点或跟方位 副词则不需要加介词。
Correct sentence
The firemen arrived at the scene of the fire and rescued them.
