在你开始下降前，确保绳子已牢固系好。

Make sure the rope is ___firmly attached before you start the descent.

我用力关上门，以阻挡寒风。

I ___firmly closed the door to keep the cold wind out.

她坚信每个人都值得拥有第二次机会。

She ___firmly believes that everyone deserves a second chance.