怀疑论质疑知识的可能性本身。

Skepticism challenges the very ___possibility of knowledge.

我们正在考虑搬家的可能性。

We're considering the ___possibility of moving house.

这次会议为你提供了展示自己能力的绝佳机会。

This meeting gives you a great ___opportunity to showcase your skills.

我们正在讨论几种晚餐的选择。

We are discussing several ___possibilities for dinner options.