Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

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

Explain?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

Give it food and it will live; give it water and it will die.

I am white when I am dirty, and black when I am clean. What am I?

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

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

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?