Open the brackets to know what happened to Robert. Robert always (to leave) his keys in the hall but yesterday he (can,

Robert always leaves his keys in the hall but yesterday he could not see them anywhere. Robert didn\'t  lock the door and left the house. He met John in the street and joined  him. He told John about the keys. John  laughed a lot and then he  shouted, \"Look! Your keys are in your pocket.\"