Solution:

All (all months have twenty eight days atleast)

Solution:

I am Stamp.

Solution:

Yes. By selling them.

Solution:

Chile

Solution:

Yes. All three of them are the best. Laughter is the best medicine, living well is the best revenge and a good offense is the best defense.

Solution:

Sun

Solution:

Pear

Solution:

I am a Garbage Truck

Solution:

Donkey

Solution:

Both come out at night