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

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

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

what does the below rebus means?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

What is the centre of gravity?

What has to be broken before you can use it?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?