The problem _____ so quickly last night will not be set again .A having been settled B settle C be settled D settledA和D有什么区别那能帮我解释下A和D的区分方法吗？教材上写的having been done 相当于过去分词

Jenny is so clever that she can work out the problem so quickly.(保持愿意）Jenny is clever _____ ______ work out the problem so quickly. 1． 【72583】 Much _____ said about the problem but nothing _____ been done so far． He is so clever that he can solve the math problem quickly同义句He is _____ ______ _____ solve the math problemHe is _____ ______ _____ that he can solve the math problem quickly I worked out the problem so( )(easy) The problem is not _____ easy. Think _____ over. 怎么填?选项：A. such, it B. that, it C. so,不填 D. that,不填 To work out the problem is very hard .(同一句) _____ is very _____ _____ work out the problem . so this is not where the problem lies. With the teacher's help,I work out the problem.的同义句_____ _____ _____ _____ the teacher,I work out the problem. With the teacher's help,I work out the problem.的同义句_____ _____ _____ _____ the teacher,I work out the problem. They are _____(plan) to discuss the problem this afternoon. I have much trouble _____ (solve) the problem.怎么填? _____(解决) the difficult problem.（不是solve） They haven’t succeeded _____ working out the problem The foods you eat could help solve this problem.=The foods you eat could _____ _____ this problem. 翻译：Millie 不知道如何解这道题.Millie doesn't know how _____ _____ _____ the problem. 没有你的帮助,我解不出那道数学题 I can't _____　_____ the Maths problem _____ _____ _____ ____ _____ talking to your friend?Can you explain how ____ ____ _____ the math problem?My parents always a_____ with each other.I want to have a party to s_____ him.So I don't tell him. The girl is so clever that she can think a way to solve the problemShe is ____ ____ _____ girl that she can think a way to solve the problem