1.make questions in the past(simple or progressive).ask for the words in bold prints.
a.kevin and ralph went on a sight-seeing tour IN LONDON.
b.while kevin was talking to the guide RALPH was watching the traffic.
c.when the bus finally arrived THEY TOOK A SEAT AT THE TOP.
d.while ralph was looking at the sights THE GUIDE explained everything about the city.
e.while ralph was sitting in a restaurant near trafalgar square kevin BOUGHT A BOOK.
hilfe 
[/i][/b]