英语翻译Every possible means____to work out the problem,but it is too difficult for usa.is used b.are used c.has been used d.have been used

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英语翻译Every possible means____to work out the problem,but it is too difficult for usa.is used b.are used c.has been used d.have been used

英语翻译Every possible means____to work out the problem,but it is too difficult for usa.is used b.are used c.has been used d.have been used
英语翻译
Every possible means____to work out the problem,but it is too difficult for us
a.is used b.are used c.has been used d.have been used

英语翻译Every possible means____to work out the problem,but it is too difficult for usa.is used b.are used c.has been used d.have been used
c 为了解决这个问题,每一个可能的方法都用过了,但是对于我们来说还是很难.

D.manage D.manage manage to 设法;达成 manage, manage to do sth.设法完成某事

选C every 加名词谓语动词用单数,此时态表示所有的方法都已经被试过,所以用完成时。

选c吧,means方法,单复数一样。已经用过很多方法,但对我们来说太难。