There’s a feelingin me __________ we’ll never know what a UFO is not ever

Could you tell me what happened?— I’m not going to tell you about it, it’s ________.[ ]

The decision has been made and I have got toit.

Do you know how to _______this word –Yes, B-A-L-L.

下列句中的“以”字的意义用法不相同的一项是（ ）