every possible meanssafe to drink.A.is triedB.has been tried C.have been tried D.are tried 改选哪一个为什么?

every possible means 是用单数还是复数 try every possible means 为什么是means 不是mean.不是说有every each修饰时用单数 Every possible means -----,but none proves successful.A.has been triedB.tried 英语试题:Every possible means _(be)tried.请给出解题详情. Every possible means _______ to save the wounded hero up to now.Every possible means _______ to save the wounded hero up to now.A.have tried B.has tried C.have been tried D.has been tried 选择：Every possible means ( ) to prevent the air pollutionis used?are used?has been used?have been used? by every means 还有by any means 英语翻译They tried every possible means to （）the old man into signing the paper.A.cause B.frighten C.let D.make The government____ that they will try every possible means to prevent the diseasespreading throughtout the country.A.decided B.declared C.announced D.informed为什么选B, He tried every possible means;he couldn't get the result he wanted,_________如题,怎么填?一个单词哦~ Every possible ________ has been tried to help those less developed students.A ways B methodsC manners D means此题为什么答案选D, 请教个语法知识.我英语语法很差.1、Every possible means has been tried,but none worked.2、All possible means have been tried,but none worked.为什么第一句中用has been ,第二句中用have been、?请分析下,另外been前加has/ Impossible means I am possible是什么意思麻烦解答,谢谢! 英语翻译If I were young again,I would from a habit of concentrationI would let nothing come between me and the subject in hand.i would use every possible means to improve my memory. 我不知道明天还有什么事要做.__,I will try every possible means to come to the party.A Even though B anyhow （Even though 是用来引导状语从句,设空号处为逗号,故排除A项） The government____ that they will try every possible means to prevent the diseasespreading throughtout the country.A.decided B.declared C.announced D.informed为什么选B,为什么不选c Every possible means_____ been tried,and we find only______ this means can we do it well．A.have,in B.have,by C.has,in D.has,by Every possible means ___.was tried has been tried.为什么不能选 Was triedA Two fifth,is B Two fifths,is我只想知道Two fifth,Two fifths 两个的区别,含义~