Artists who (19)________________pictures on the pavement with chalk used to be a common sight in London, but there (20) ________________only a few left now. Sometimes the pictures are very good. This is proved by the fact that one of the (21) ________________favourite tricks is to draw a five-pound note and see a lot of people trying to pick  it up. The police usually treat pavement artists kindly and there is nothing in the law against drawing on the pavement unlesss the artist is so good that he gets a large (22 )________________.around him and this prevents other people from passing freely along the street.
19  A. draw        B. paint        C. take        D. print
20 A. is            B. are            C. was            D. were
21 .A. artist        B. artist’s        C. artists        D. artists’
22 .A. meeting        B. collection        C. gathering       D. crowd