I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

How many times in a given day, minutes and hour clock comes in a straight line ?

People put me on the table and cut me but do not eat me. What am I?

Buy me, smell me or deliver me, I do not change.

Who am I?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

How many words can a pen with half refill write?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?