消防员迅速采取行动扑灭了大火。

The firefighters took ___action quickly to put out the fire.

现在是行动的时候了，不要只是等待。

It's time for ___action, not just waiting.

为了保护环境，我们必须现在采取行动。

To protect the environment, we must ___take ___action now.