| A.they are busy reading books |
| B.they are not very polite |
| C.they are busy playing with their electronic equipment |
| D.thinking about their private things |
| A.Tube Exits | B.iPod |
| C.ISteam | D.iShoot |
| A.delighted | B.amused |
| C.controlled | D.busy |
| A.London commuters are unfriendly to strangers |
| B.technology is changing the way London commuters spend their traveling time. |
| C.with all the new time-fillers, London commuters often forget to get off the train. |
| D.Apple has earned a lot of money from selling 40,000 iPhones |