Ladies and gentlemen, today I will talk about the underground in London . Underground tickets are available at all underground stations. Ticket prices for underground (1) ____ ( vary /very ) according to the distance you travel. The network is (2) ____ ( divided /beside)into five zones, a (3) ____ (control/ central ) zone and four outer zones. Generally, your (4)____( fare /fair) will i ncrease the more zones you travel ( 5 ) ____ (through /though). You must buy your ticket before you start your journey from a ticket ( 6 ) ____ ( office /officer) or machine. Keep your ticket for inspection and collection at your ( 7 ) ____ ( destination /determination).The easiest and most ( 8 ) ____ (historical/ economical ) way to travel around London is with a travel card. This gives you the freedom of London’s trains, tubes, and buses in ( 9 ) ____ (whatever/ whichever ) zones you choose. Travel cards are available from any train or tube s tation .9