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.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

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

Explain?

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

How many sides does a circle have?

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

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?