我有一种奇怪的感觉，觉得有人在看我。

I had the strange ___sensation ___that someone was watching me.

一种不安的感觉渐渐袭来，我觉得自己忘记了什么重要的事情。

An uneasy ___sensation crept over me that I had forgotten something important.

她无法摆脱那种今天会很特别的感觉。

She couldn't shake the ___sensation that today would be special.