Answer:
I am the book one can never finish reading
I make billions of dollars selling windows. Who am I?
I am always coming but I never arrive. What am I?
A sport with love and service played by singles and pairs.
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic