Questions 22 to 25 are based on the conversation you have just heard.

A．The criticism of English food by visitors is unfair.
B．It is impossible to find good English food in large towns.
C．As well as food people also travel to Britain for shopping and sightseeing.
D．If people complain about English food, they will get better food.

A．To drive the train after it is started automatically.
B．To start the train and to drive it when necessary.
C．To take care of the passengers on the train.
D．To send commanding signals to the command spot.