请解释一下far的用法After two years’ research,we now have a ________ better understanding of the disease.A.very B.far C.fairly D.quite

请解释一下far的用法After two years’ research,we now have a ________ better understanding of the disease.A.very B.far C.fairly D.quite 请解释一下consider的用法 as far as,after all 这两个词组的用法? 请解释一下虚拟语气的用法? so far 的用法 so far的用法? so far的用法 How far 的用法 by far 的用法 in two hours 和after two hours 的区别 最好能告诉我用法 as far by the far的用法 that the evidence is inconclusive,请解释一下that的用法 请解释一下Therefore的用法.（要全面） far away的用法far,away,far away from,away from,far from 的具体用法. 现在完成时so far的用法 by far 的用法(比较级) far better,quite better的区别.Eg:After two years ' research,we now have a ___better understanding of to disease.A.very B.far C.quite Although he is far abroad from his hometown,he is much ___his familyA concerning aboutB concerned aboutc concerning withd concerned虽然我已经知道答案,可是并不清楚为什么,请解释一下concern的用法