请用适当的词完成下面这篇短文，并把所缺单词填写在答题卡指定的位置上。每个空只能填写一个形式正确、意义相符的单词。

It was a fine day last Sunday．John went to a supermarket to do some      ．Because it’s a little far away from his home, he      his car there．It was difficult for him to find a place to park his car．At last he found one at the corner between two buildings．After parking his car he went into the supermarket to       the things he needed．Twenty minutes      , he finished shopping and took the things slowly back to the car park．Suddenly he        two young men trying hard to open the door of his car．They were both wearing black        ．John knew they were the car thieves． But he was       and didn’t know what to do．He thought for a moment．Then he got an    ．He went up to them and shouted loudly: “Can I help you? I think you lost your keys． You can use      ．” “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!