dear striver, many of yours sentences are wrong. correction for those sentences is under:

A ten feet long snake made people run here and there.
A ten foot long snake made people run here and there.

We are going to the concert, and so they are.
We are going to the concert and so are they.

Enclosed with this letter was a signed Affidavit and a carbon copy of his request to our main office.
Enclosed with this letter were a signed Affidavit and a carbon copy of his request to our main office.

Fear from God.
Fear God.

Pakistan has and will support the Kashmiris.
Pakistan has been supporting and will support the Kashmiris.

He has come yesterday.
He came yesterday.

Arshad's down fall was due to nothing else than pride.
Arshad's down fall was due to nothing else but pride.

Do not avoid to consult a doctor.
Do not avoid consulting a doctor.

__________________
Ability is nothing without opportunity.