Fill in the blank with the correct form of the words

IV:Fill in the blank with the correct form of the words.

16.My dad is a sport _________.He is crazy for hockey and marathons(Fan)

17. Anna joined in a volleyball world______when she was 15(champion)

18.Leo has a_______of stamps from countries around the world(collect)

19.I am not________in sports.Iam more into nature and science(interest)