The question___us is a very difficult one.为什么填before?这里befor

The question___us is a very difficult one.为什么填before?这里befor the problem （）me is a very difficult one A.after B.before C. The question ___ us is very difficult one. the question is very difficult no one can answer The (one) lesson is very difficult.适当形式填空 Predicting the future is notoriously difficult.predict在这里为什么 To tell me one twin from the other is very difficult.同义句 ___ difficult,one,is,the,questions,to,answer,very,of 连词成句 This book is very more difficult than the one I recommended the new is very surprising这里为什么用surprising为什么? science is very difficult （）interesting.为什么填but.难道句子省略什么了?为什 The question is very difficult (改感叹句 )