I have teeth but i don't bite. Who Am I ?

Which five letter word can be added at the end of below word to form a
valid word?

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If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I look at you, you look at me, I raise my right, you raise your left. What am I?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

What word is pronounced the same if you take away four of its five letters?

What is always in front of you but can’t be seen?

You can see it everyday, But cannot touch it at will. What is it?

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