7 Complete the sentences. Use the articles a or the where necessary. A. The centre of theatre life in Britain is Lon- don, but in most (1) ... cities and (2) ... towns of (3) ... country there are (4) ... theatres too. There are about (5) ... hundred theatres in London. Half of them are situated in (6) ... West End. Probably (7) ... most famous theatre is (8) ... Royal Opera House at Covent Garden, which is in (9) ... central London. There you can listen to operas and also watch ballets by the Royal Ballet, which has become very successful. There are many theatres and (10) ... theatre companies for young people. (11) ... National Youth Theatre and (12) ... Young Vic Company in London are among them. B. This guidebook gives you information about Washington, D.C. Here you can find (1) ... texts about all the museums of (2) ... city. For example, on (3) ... page 56 you can read about (4) ... National Museum of American History and (5) ... some other museums as well. Children often go to (6) ... Natural History Museum where they spend hours learning about how life developed on (7) ... planet. Another must for (8) ... visitor to Washington, D.C. is (9) ... National Air and Space Museum, possibly (10) ... most popular of Washington's museums and (11) ... most visited museum of (12) ... world.