神马品牌网苏宁店庆时间:高一英语
来源：百度文库 编辑：神马品牌网 时间：2024/04/28 09:53:47
The missing boy hasn't been found though all possible means _________ tried.
A has been
B have been
C has
D have
A has been
B have been
C has
D have
B复数用have,被动语态用been ,所有办法都已偿试但无所获.完成被动时态
means (单复数同形)可以指人或物，其含义为“手段”或“工具”；这个词不仅用于具体的东西，也可以用于抽象的意念。如：means of production 生产资料，means of living 生活资料
The next step would be to develop means for sending television pictures.
a means to an end
达到目的的方法
选B.
这个句子的意思是:虽然所有可能的方法都已经试过了,那个丢失的男孩还是没有找到.
means 单复数的同形,意思为方法.
要区分它是单数还是复数,要看修饰它的词语.
在这个句子里,用了all 来修饰means ,表明是复数啊,这里肯定用现在完成时态啊
eg.There is only a means to solve the problem.
B
一个现在完成时的被动语态
means在这里是方法的意思，前面用all修饰了，说明是复数，所以排除A、C，所以 选 B
B.复数用have,被动语态用been
我觉得应该选C的！