What word begins and ends with an E, but has only one letter?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

I am the fastest animal but cannot climb the tree. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

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

O_er_t_o_

Complete the missing letters of the given word.

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?