What is the word or phrase?

I am sure no one can have two things for dinner. what are they?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

People make me, save me, change me, raise me. What am I?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

Why Wine Glass Stem is so long?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.