I would like__maths,I think it's diffcult to learn

I would like__maths,I think it's diffcult to learn I think it diffcult to learn English well.为什么it后面不is?it在这里的作 I think it's for you to learn Chinese well "I think it would be great." "I think it's going to be great I think music is diffcult to learn改否定句 百度知道 i think i would like most to learn math I Think　it’s too diffcult 为什么要加it’s Because I think it's useful.I want to learn English[ ].补全对话 I think it's going to be a big problem .Yes,it would be.I wo I think it's going to be a big problem.yes,it would be.I won I find it diffcult to learn math well的同义句 T_____ English is diffcult,I should try to learn it well.