bulb

当灯泡烧坏时，我不得不买个新的。

When the ___bulb burnt out, I had to buy a new one.

我们几乎在所有地方和所有事情上都使用灯泡。

We use the ___bulb everywhere for almost everything.

我们几乎在每个房间都用灯泡照明。

We use the ___bulb for lighting in almost every room.