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

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

What month of the year has 28 days?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

How can you take 2 from 5 and leave 4?

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?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What you cannot hold but it is yours?

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

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?