chuyển từ câu trực tiếp sang câu gián tiếp : 11 'Where is the ticket office?' asked Mrs Jones. 12 'What shall I do with my heavy luggage?' she said. (Use should.) 13 'What platform does the train leave from?' asked Bill. 14 'When does it arrive in York?' he asked. 15 'When was the timetable changed?' I asked. 16 'Why has the 2.30 train been cancelled?' said Ann. 17 'How much does a day return to Bath cost?' Mrs Jones asked. 18 'Why does the price go up so often?' she wondered. 19 'How can I get from the station to the airport?' said Bill. 20 'When are you coming back?' I asked them.