Robert is sixteen now. He'll finish middle school in two years. His father has a shop and got much money. He hopes his son can go to university and makes him study hard. But the young man likes to play cards. He has to go out when his parents fall asleep. One night, when Robert came back, his father happened to see him. The old man was very angry and told his son to live upstairs. Robert has to go up and down quietly. Of course it troubles him. He thought and thought but didn't find a way. Last evening Robert listened carefully. And he was sure his parents went to sleep, he went out to play cards with his friends. He won some money and was happy. And he got back, he took off his shoes and was going upstairs. He heard a noise in his parents' bedroom. He stood behind the door and saw a man come out. He understood it was a thief  . He stopped him at once. The man was very afraid and brought out all the things he stole   in the room. "Tell me how you didn't wake my parents up," said Robert. "Or I'll take you to the police station!" Robert listened carefully because he wanted to know   _
if his parents went to sleep if he woke his parents up if it was raining hard outside if someone came in