Read the article about London's Tower Bridge. Choose the best word for each space.







Many tourists #1 visited Tower Bridge. It is the only bridge over the river Thames that can open and #2 ships pass under it. Tower Bridge was built in 1894 and #3 uses the same machines to lift up the two halves of the bridge. In earlier times, the river was #4 busier than now and the bridge #5 to open over a thousand times a year. Today, it only opens twice a week.
In 1952, a big red bus was #6 the middle of the bridge #7 it started to open. The driver only just got to the other side in time! Of course, now #8 are lights at #9 end and the traffic must wait for them to go green.