阅读短文，根据短文内容填空。 Mrs. Brown's grandfather lived with her and her husband. Every morning he took a walk in the park and came home at half past twelve for lunch. But one morning a police car stopped outside Mrs. Brown's house at twelve o'clock, and two policemen helped the old man to go out. One of them said to Mrs. Brown 'The poor man didn't find his way in the park and telephoned us for help, so we sent a car to bring him home.' Mrs. Brown was very surprised, but she thanked the policemen and they left. 'But grandfather,' she said. 'You go to the park every day. How did you lose your way there?' The old man smiled, closed one eye and said, 'I didn't quite lose my way. I just got tired and I didn't want to walk home.' 1. It was time for Mrs. Brown's grandfather to come home to at half past twelve every day. 2. , Mrs. Brown saw a police car stopped outside her house one day morning. 3. 'You often go to the park, how did you there?' Mrs. Brown said to her grandfather. 4. In fact, the old man was he didn't want to go home on foot.