i think (playing)is (不填）great fun

i think (playing)is (不填）great fun I think doing sports is great --------(fun) I think it is a great fun.改错) Hiking is ___ in spring,I think.A.a great fun B.great fun C. does sandy think playing volleyball is fun?i think i have a i had lots of fun （）in the water last sunday这里为什么填playing不填p i think Halloween is __for children A a great fun B great fu I think living in the countryside is _ A.a great fun B.great i think -----（run）is fun I think playing computer games is not（）应填interest、interestin i like playing basketball i think playing basketball is f_ 填 I think the school trip( ) great填was还是is