I'm sure you___（have）fun learning English from now on

I'm sure you___（have）fun learning English from now on Learning English and have fun I' m in London.I'm learning English now.I'll go back China i I shall study harder at English from now on . I have some advice on learning English和 I have so from now on,I have nothing to lose怎么解释? With your help I ____ English fun to learn by now.(have) I'm not sure mens____________ A.I have an idea B.I don't now I have ___(confident) in learning English i have __in learning english and i'm so worried .could you h We all have fun learn English on class（fun后面填什么?） The fun of learning english