Answer:
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
What comes once in a year twice in a week but never in a day?
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 am the building with the most number of stories.
I plow and plow but never sow.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk