Choose the right answer

18.     I think a hobby will always give you          and help you                  .
          A. pleased - relax                               B. pleasure - relaxed      
          C. pleased - relaxing                          D. pleasure - relax
19. You can share your stamps_________other collectors        a stamp club.
         A. with - at           B. to - at                 C. with - in           D. to - in
20.     I think this hobby does not cost you much, and              you need is time.
          A. most                 B. all of                C. some                D. all