Answer:
What two letters in the alphabet say goodbye?
There's one in every deck of cards and in a famous movie
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
What starts with the letter T, is filled with T and ends in T?
I can be as thin as a picture frame but my insides have many things you can see.
What is always coming but never arrives?