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

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

What is the Surname of Barbie Doll?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

If you say my name, I will no longer exist. What am I?

What has many keys but can’t open a single lock?

John was piloting a plane behind a car but was never able to overtake it. Why?

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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?