Answer:
I fly when I'm on and float coming off.
The letter S is added to pluralise most words in the English language. eg. Letter to Letters Word to Words and Language to Languages. But I am a word that is pluralised with the addition of the letter C.
found at the back of the book.
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?
The answer I give is yes, but what I mean is no. What was the question?