The firemen saw the fire.The firemen began to fight against the fire.(合并一句)--------- ---------- the fire,the firemen began to against the fire.

问题描述:

The firemen saw the fire.The firemen began to fight against the fire.(合并一句)
--------- ---------- the fire,the firemen began to against the fire.

On seeing the fire,the firemen began to against the fire.

On seeing

On seeing the fire,the firemen began to against the fire.一看见,就开始灭 那就给你解释下吧:on作为介词有这种用法表示:在...的时候,在...后立即比如:He jumped with joy on hearing the news.他一听到这个消...

After seeing