Choose the best answer

17. The film was so boring . ______________, An saw it from beginning to end.
   A. Therefore              B. Despite                   C. However                 D. Although
18. ____________ being frightened by the images, Lan still liked the film so much.
   A. In spite                 B. Despite                   C. Although                D. Nevertheless
19. ________________ is La Tomatina celebrated? – Every August.
   A. Where                   B. Why                       C. When                     D. Which
 20. My father liked the _________________ of that singer.
   A. perform                 B. performer                C. performance           D. performing