听下面一段对话，完成第1至4题。 1. What can we know about St. Albans? A. It's where Cambridge is. B. It's at the seaside. C. It's not in France. 2. Why did Herbert come home at that time? A. Because his holiday was over. B. Because he had no enough money. C. Because it was too hot and sticky. 3. What can we know from the speaker? A. The police watched the house for the family. B. Herbert had done something bad. C. Herbert returned to the wrong house. 4. Who was Frank? A. Herbert's neighbor. B. A policeman. C. A police officer.