（9分）写出以下化学反应的文字表达式，并在括号中填写所属的基本反应类型。

（1）硫在空气中燃烧________（   ）

（2）铁在氧气中燃烧________（   ）

（3）水在通电条件下分解成氢气和氧气________（   ）

27. _____ in a friendly way, they both were satisfied with the result.

A．Having been settled their quarrel

B．Their quarrel being settled

C．Their quarrel settled

D．After their quarrel settled