Summer holiday began and Richard left California and went traveling in Africa[1]. He lost his wallet in a hotel and he had a little money left. He had to go to a city where one of his friends worked. There he was going to borrow some money so that he could fly back to his country. He got on a bus and the conductor held out to him a yellow ticket. "You had better buy a yellow ticket," said the conductor. "It's ten dollars. I have two other kinds. The red one is five dollars and the green one is three dollars."

　　It took them two days to get to the city. The passengers had to stay for a night when they were halfway[2]. Richard had to pay[3] five dollars for the hotel and food. He thought for a while and then said, "Green, please."

　　The bus started. Now it was getting dark[4] and the bus began to go up a hill. It was very steep[5] and soon the bus stopped as usual.

　　"Yellow ticket passengers," the driver shouted, "Stay in the bus, please. Red ticket passengers, get out and walk. Green ticket passengers, get out, close the door and push the bus!"

　　Notes:[1]Africa/`frIk/n. 非洲  [2]halfway/`ha:f`weI/ adv. 半路 [3]pay/peI/ v.付（款） [4]dark/da:k/ adj. 黑暗的 [5]steep/sti:p/ adj.陡峭的

　　1.Where did Richard come from?

　　2.How much did Richard have after he lost his wallet?

　　3.What did Richard go to the city for?

　　4. How was Richard going back to his country?

　　5.Why did Richard buy the green ticket?

　　6.What did Richard have to do when the bus went up the hill?