riddles

I like food, but water kills me. What am I?

What begins with T, finishes with T and has T in it?

What starts with the letter P, ends with the letter E and has thousands of letters?

What occurs twice in a week, once in a year but never in a day?

What occurs once in every minute, twice in every moment and never in a thousand years?

Which two keys cannot open any doors?

Dogs have fleas. What do sheep have?

What four days of the week start with the letter T?

How many letters are in the alphabet?

What is the longest word in the English language?