Is it difficult ____ English well (A.learn B.to learn C.learning)

I ____ science today.It is difficult ____ interesting. Math is different ______Chinese.It is a little difficult ____ it is difficult it is difficult at The question is too difficult for any of us to answer.同义句It's ____ ____ ____ question ____ ____ of us can answer it. This problem is so difficult that we can't work it out.(保持句意不变）This problem is ____ difficult ____ us _____ work out. Is it difficult ____ English well (A.learn B.to learn C.learning) is it difficult ______(finish) ____(work) out the problem in five minutes It is difficult to ____ too many things home.a.eatb.drinkc.bring d.need I thought English was ___ at first,so I was ____ in it.But now,I find it is very difficult,so Ilost my ____ in it.(interest) Everythingt is difficult before it is parents found it is difficult/it difficult/it was difficult to teach children.说明选择原因 Greek is a language I found__to learn.A.is difficult B.it is difficult C.it difficult D.difficult. the problem is very difficult,but he worked it out ____ a last b end c finallythe problem is very difficult,but he worked it out ____ .a last b end c finally It is very difficult to make correct ____(决定)all the time为什么不填decision 而填decisioms It is difficult to ____ his words ___- his actions.A.compare;withB.relate;to请问应选哪一个? It is difficult () out this maths problem it is very difficult for me.