你能打开灯吗？

Could you ___switch the light ___on?

我们将打开一盏灯，唱'生日快乐'，然后派对开始。

We will ___switch ___on a light and will sing "Happy Birthday" and the party will begin.

请打开风扇；天气变热了。

Please ___switch ___on the fan; it's getting warm.