Answer:
I am tomorrow's yesterday and yesterday's tomorrow. What am I?
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
I love spinach.
I am an instrument that you can hear but cannot see or touch. What am I?
I wiggle and cannot see; sometimes underground and sometimes on a tree. I really don't want to be on a hook and I become a person when combined with “book”.
It rows quickly with four oars but never comes out from under his own roof. What is it?