Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

I taste better than I can smell. Who am I?

What's the only room from which no one can enter or leave

O_er_t_o_

Complete the missing letters of the given word.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

What Does this text mean:

important=important

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Do you know who was buried in John's tomb?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?