It was a fine day last Sunday. John went to Tianlong supermarket to do some （shop）. Because it's a little far away from his home, he drove his car there. It was difficult for him to find a place （park） his car. At last he found one at the corner between two buildings. After parking his car he went into the supermarket to buy the things he needed. Twenty minutes later, he finished shopping and took the things （slow） back to the car park. Suddenly he found two young men trying hard to open the door of his car. They were both （wear） black clothes. John knew they were the car thieves. he was afraid and didn't know what to do. He thought a moment. Then he got idea. He went up to them and shouted loudly: "Can I help you? I think you lost your （key）. You can use （I）." "Can your keys open this door? Why?" "Yes, because it's my car." When the two men heard this, they ran away as as they could. In this way, he stopped the thieves from stealing his car. How clever John was!