'It's' in the Bible

"You are the salt of the world. But if the salt should lose its taste, how can it be made salty again? It's good for nothing but to be thrown out and trampled on by people.

When evening had come, the disciples went to him and said, "This is a deserted place, and it's already late. Send the crowds away so that they can go into the villages and buy food for themselves."

When the disciples saw him walking on the sea, they were terrified and cried out, "It's a ghost!" And they screamed in terror.

"Have courage!" Jesus immediately told them. "It's me. Stop being afraid!"

Peter answered him, "Lord, if it's you, order me to come to you on the water."

He replied, "It's not right to take the children's bread and throw it to the puppies."

Then Peter told Jesus, "Lord, it's good that we're here! If you want, I'll set up three shelters one for you, one for Moses, and one for Elijah."

His disciples asked him, "If that is the relationship of a man with his wife, it's not worth getting married!"

He told them, "You will indeed drink from my cup. But it's not up to me to grant you a seat at my right hand or at my left. These positions have already been prepared for others by my Father."