Read the article “Twelve weeks in the life of volunteers” and answer the questions

Christmas is the (1) occasion in modern Britain on which a lot of traditions (2) are preserved by most ordinary people.     (3) is celebrated
Today it (4) is connected with “making money by shops” that is now the part of traditions: most people (5) follow the tradition of buying gifts for their family members.
People also buy a Christmas tree. This tradition came from Germany. 
It (6) was introduced in the nineteenth century. Every Christmas, London gets a gift from people of Norway – a Christmas tree that is 23 metres high. 
It stands in the center of London, in Trafalgar Square and it is decorated with 500 white lights.
Christmas is a time that (7) ___ unites families.
At night people get together to (8) ___ mark Christmas. Celebrating Christmas (9) ___ includes a 
Christmas dinner and listening to the Queen’s Christmas (10) ___ speech when the Queen speaks directly to “her” people on TV and n the radio.
……There are many royal traditions in Britain. The Queen’s telegram is not a very old custom but it is for very old people. Every British person gets a telegram from the Queen on their one-hundredth (11) __ anniversary .
…The Changing of the (12) guard is a very beautiful tradition. Every morning tourists go to watch the ceremony at Buckingham Palace. At 11.30 the guard that stands in front of the palace change.