1、着火
...load … with sth. 给… 装某物be on fire 着火(强调状态)catch fire 失火(强调动作,无被动语态) ...
2、在
... be of great help对于…颇有帮忙 be on fire在.失火 be on holiday在假期中 ...
3、失火
...assumption:假设be on fire:着火,失火assistance:帮助 ...
4、着火了
...在报纸上 in the newspaper着火了 be on fire5. 没问题 no problem ...