London taxi drivers know the capital like the back of their hands. No matter how small or indistinct the street is, the driver will be able to get you there without any trouble. (1)_________________________. During this period, which can take two to four years, the would-be taxi driver has to learn the most direct route to every single road and to every important building in London. (2)_________________________. Learner taxi drivers are tested several times during the training period by government officers. The exams are terrible experience. The officers ask you "How do you get from Bimp3ingham palace to the Tower of London?" and you have to take them there in the direct line. When you get to the tower, they won't say "well done". They will quickly move on to the next question. After five or six questions, they will just say "See you in two months' time." and then you know the exam is over. (3)_______________________. The training can cost quite a lot, because learners have to pay for their own expenses on the tests and the medical exam.