All possible means have been taken to prevent the river ____.[br/]答案是(being polluted)[br/]显然,这里的短语是prevent sth from doing 但这里省略了from[br/]我问了几个人,又上网查,似乎此短语用在被动语态是不能省

all possible means has been tried,but has any effect.all possible means has been tried,but() has any effect.A.no any one B.neither C.none D.either 应该选哪个答案.为什么啊. All possible means have been tried to ()the flu.a.treat b.deal c.cure d.operate the fact is that we've employed all possible means to get you even these 800cases 英语means考察means单复数同型,易考察主谓一致1.All possible means have been tried,but not a *mean* has works. 第二个*mean*还加s吗?2.by means of是什么意思? all things are possible If at all possible Rome,by all means by all means by all means by all means 7.All possible means __________ to save the hero.A.has tried B.have tried C.has been tried D.have been tried All means that _____ possible _____ been used to save himA.is; have B.were; have C.was; has D.are; hasB.为什么? 英语翻译One possible candidate for l(x) is q(h(x)g2(x))-1h(x) for all h(x) such that h(x)g2(x) is invertible for all XER. 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/ 词义辨析By means of.by no means.by this means.by all means every possible means 是用单数还是复数 Impossible means I am possible是什么意思麻烦解答,谢谢! by no means和by all means的意思