Choose the suitable word to fill in each plank.

ART FACTORIES

Several years ago an old factory on the edge of Paris was turned into an exhibition centre. This helped many artists (21) _______ had found it too expensive to work in the centre of Paris, and so for the (22) _________ few years painters, musicians, actors and other people (23) ______ had space to work and perform. The people behind the idea now (24) ________ to change the use of other old buildings (25) _________ the same reasons. Sometimes the use of the buildings can only (26) _________ for a short period of time, a year for example, (27) _________ the opportunity is always worth it for the young artists. On one occasion a businessman lent an old building (28) _____ the organizers for two years, and in that time the artists were (29) ___________ to put on concerts, art exhibitions and fashion shows to (30) _________ the local people.

The water in this river will be polluted unless some measures _________ .