补全对话（每小题1分，共5分） Dave：Can I ask you some questions, Sally? Sally：Sure! What’s up? Dave： 小题1: Sally：Yes, it’s a little far. Dave： 小题2: Sally：First, I walk to the bus station and then I take the bus. Dave：How long do you spend on the bus? Sally： 小题3: Dave：Do you need to walk after you get off the bus? Sally： 小题4: Dave：How many students in your class take the bus to school? Sally： 小题5: Dave：Thanks a lot.