A．Workaholic.
B．Serf-disciplined.
C．Active.
D．Creative.

A．It has open doors at the back.
B．It can avoid the traffic jam above the ground.
C．It is red with double-deckers.
D．It requires a travel card.

A．It is a kind of bendy bus.
B．It has a history of 100 years.
C．It has already been out of service.
D．It has many open doors.