Find the odd one out A, B, C or D

II. Find the odd one out A, B, C or D

1. A. clean B. street C. house D. wall
2. A. horse-riding      B. challenging      C. bird-watchingD. mountain-climbing
3. A. usual B. write                  C. walk                  D. eat
4. A. pottery              B. enjoy                C. flower               D. wood