选择O₂、CO或CO₂填空，并写出有关反应的化学方程式：

（1）能使带火星的木条复燃的是______．

（2）能用于灭火的是______．

（3）能在空气中燃烧的是______，反应的化学方程式是______．

（4）能使紫色石蕊变红的是______，反应的化学方程式是______．

—I'm not________up so early yet but I have to________myself to it.

—Yeah. Just as the saying goes, "An early bird catches the worm". [ ]

A. used to getting; adapt

B. accustomed to getting; accustom

C. used to get; adapt

D. accustomed to get; accustom