Riddles about letters

"Welcome back to the show. Before the break, Mr Ixolite here made it to our grand finale! How do you feel Mr.Ix?" "Nervous." "Okay, now to win the star prize of one million pounds all you have to do is answer the following question in 90 seconds." "Okay, I'm ready." "Right. In 90 seconds name 100 words that do NOT contain the letter 'A'. Start the clock!" Can you help?

What comes once in a minute, twice in a moment, but never in a thousand years?

I'm in you, But not in him, I go up, But not down, I'm in the colosseum, But not a tower, I'm in a puzzle, But not a riddle.

What letter is next in this sequence? M, A, M, J, J, A, S, O,__

How do you make the number one disappear?

What always ends everything?

What's the missing letter? J ? M A M J J A S O N D

I’m at the beginning of the end and the start of eternity, at the end of time and space, in the middle of yesterday but nowhere in tomorrow. What am I?

Tommy Tucker took two strings and tied two turtles to two tall trees. How many T’s in that?

With thieves I consort, with the vilest, in short, I'm quite at ease in depravity; Yes all divines use me, And savants can't lose me, For I am the center of gravity.