| A.They start selling tickets at 9:30 a.m. |
| B.They are connected to change machines. |
| C.They offer special service to the elderly. |
| D.They make change for no more than $5. |
| A.At midnight | B.at 5 a.m. |
| C.at 3 a.m. | D.at 7 p.m. |
| A.It is convenient for old people |
| B.It saves money for its users |
| C.it can be bought at any time |
| D.it is sold on the Internet. |