我们对事故的原因保持开放心态。

We ___keep ___an ___open ___mind about the causes of the accident.

在现代社会，保持开放心态很重要。

To ___have ___an ___open ___mind is important in modern society.

在掌握所有事实之前，你应该始终保持开放心态。

You should always ___keep ___an ___open ___mind until you have all the facts.