Tom is a young man. He has a very big dog and he has a very small car, too. He likes playing tennis. Today he plays tennis for two hours at the club and then he wants to go home by car. His dog comes after him, but it does not jump into the same car. It jumps into the next car. "Come here, foolish  dog!" Tom shouts at it, but the dog still stays in the next car. Tom puts his key into the lock of the car, but the key does not turn . Then he looks at the car again. It is not his car! He is in the wrong car! And the dog is in the right car! When Tom puts his key into the lock of the car, the key   _  .
doesn't turn turns is lost isn't lost