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’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Which point will the car reach to go out?

The dirtier I get, the whiter I look. Who am I?

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

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

Can you find the missing piece of the Porsche?