what has ___has been done?A been doneB to be done C to doD done句子翻译还有为什么选那个?能不能说明下 为什么。

what has ___has been done?A been doneB to be done C to doD done句子翻译还有为什么选那个?能不能说明下 为什么。 he has been there teice （twice划线）对划线部分提问___ ___ ___has he been there? There ___has been_______ great changes in our country since 1979.(be)这里填has been对吗?应该用完成时吧? 一道高中语法题（要解析,___has been announced ,we shall have our final exams next month.A.AsB.What “what has been up to From what has been mentioned what has been down has been down成分分析 what a week this has been what has been up with you?是什么意思 from what has been under discussion ___has recently been done to improve the conditions of elementary schools a great number of children are unable to go to school.A.That B.What C.In spite of what D.Though what education is what survives when what has been learned has been forgotten翻译成中文 The book ___has been lying__ on the floor for ten minutes,but no one ＿has picked＿＿＿ it up.第二空为嘛也用完成时? It is the third time that she has won the race,___has surprised us allA.that B. whereC.whichD.what为什么不能选what,怎么判断它就是定语从句而不是同位语从句呢?区别是什么呢?谢谢~ please help me with the qestion and please tell me why you choose the answer.thang you!___has long been proved ,exercises helps to keep one' figue. A.It B.What C.As D.As it what done has been done has been done?在说说他的结构是什么时态? What has been buried has often been buried well.如题 1)He uncle has been to Europe twice.（对画线部分提问）（画线部分是twice）___ ___ ___has his uncle been to Europe?2)Anna likes pop songs.I like them,too.(改为同义句)Anna likes pop songs ___ ___I.3)My sister has never learned Frenc