S____ is very interesting but difficult to learn.

English is a language easy to learn but difficult to learn English well is very difficult.同义句 Eye contact is a very difficult art to learn.翻译 To learn Geography well is very difficult.该为感叹句 To learn Geography well is very difficult的感叹句 it,very,difficult,to,is,well,learn,english,him,for It is easy to learn English ,but it is difficult to learn it I know it is not interesting and it is difficult to learn 翻译 science is very difficult （）interesting.为什么填but.难道句子省略什么了?为什 English is difficult to learn maths is difficult to learn. It's very difficult to learn English well,but you can't___.a