A、It’s composed of 568 runs. B、It’s a blue book. C、A London driver has to do it. D、It’s an exam. D细节辨认题 。对话中女士首先提问，在伦敦对于司机的考察相当严

W: The law on car is very interesting and I know in London it’s different from other places and rules are quite strict, aren’t they’?
M: (22)Any London cab driver does a thing called the Knowledge, which is an examination really. It’s called the Knowledge and it’s a basic test of 468 runs what they call runs from a blue book.
W: Is it difficult to learn the Knowledge?
M: (23)On average, it took me nineteen months. Now it’s taking guys three years. It can take anywhere from now to three years. And then you do a driving test at the end.
W: It get the impression they’re very strict about taxis. Quite apart from the Knowledge, there’s the license. Do you have to get a new license every year?
M: The license is renewed every three years, but your cab, whether you rent it or you own it, has to have a yearly overhaul. I enjoy being a taxi driver and, not only that, it does keep the standard very high, which is what we want in London.
W: (24) Do you feel proud to be a Londoner? Were you born in London?
M: No, I was actually born in Bristol.
W: What do you do in your spare time?
M: Well, (25)I’m into body building. That takes up quite a good deal of my spare time. I might do a system of three days’ training with a day off, followed by another three days’ training and a day off.