A、6.5 hours. B、8 hours. C、7.5 hours. D、3 hours. CHow long did the tour last?

Martin is a medical student. Every summer vacation he works as a guide for a travel agency. In order to get as many customers as possible, Martin prepared a speech to attract them. On the morning of the first day, when he saw a woman coming towards the door of tire agency, he immediately opened the door for her and began to describe the tour. "The bus leaves Fairfield at 9:30. It’s air-conditioned and very comfortable. We first take you down to the old harbor. From there we drive along the coast and through an old residential area. At 12:30, we go to the Park Restaurant for a first-class meal. Then we go to the zoo in the park. From 3 till 5 we show you the shops in the old town, where you can buy traditional handicrafts, jewellery and pottery. We then go to the area where you can visit the natural history museum and the art gallery. Finally we come back along 8th Avenue, past the concert hall and theaters. You can count on a really wonderful day. "At last he stopped. The woman smiled and thanked him very much. Then she said she had lived in the town all her life and thought his description was very good. However, she only wanted to know what time the next bus left for Green Valley.