Good Riddles

Question: If we breathe oxygen in morning what do we breathe at night?

Question: What four related words are merged together: TOUS RGQC URRO IAAN RLGS EEET ENE

Question: What will happen if you shave a pink sheep on a green farm with a pair of brown shears?

Question: I am two five letter names 500 is at the start, 10 is in my heart. In the middle of that is 1, Near the end is none. At the end is 14, Yet that is not all that has been seen. It's a word that rhymes with liver, Yes, to the left of that is river.

Question: Where does a boat go when it is sick?