填空题
A -- WAY IN
B -- STAFF ONLY
C -- TICKET HOLDERS ONLY
D -- PHOTOGRAPHY PROHIBITED
E -- DO NOT PROCEED BEYOND RAIL
F -- ROAD AHEAD CLOSED
G -- POISON, WITH CARE
H -- GLASS, ATTENTION
I -- FLAMMABLE
J -- NO PARKING
K -- LOST PROPERTY
L -- LEFT LUGGAGE
M -- NO CYCLING AT THIS POINT
N -- NO LITTER
O -- BILL STICKERS WILL BE PROSECUTED
P -- FRAGILE