A The word 'hobby is an interesting word Every person has one thing he or she likes to do for fun Some people like to collect things like stamps or storybooks． Others like to play football or go window shopping where you can look at many beautiful things without buying them． I have many hobbies for fun． Sometimes I play golf with my sons and play tennis with all the families． I like to collect music books． I also collect musical instruments(乐器) from China like the erhu，the dizi，the xiao，the suona，and the pipa． These are the instruments of China which can't be found in America． My favourite hobby is fishing．l like to go and see my brother in the state(州) of Alaska where fishing is wonderful． The two of us take a boat and go to a small river where we fish for salmon． America has the most famous fish． ( )21．The word 'hobby means________