Can you find the missing piece of the Porsche?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

What have one eye but still cannot see?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

If a wheel has 54 spokes, how many spaces are there between the spokes?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Which is the correct shadow of the bird?

The more you take me, the more you leave me behind.
Who Am I?