题目内容
13.Every possible meanshas been tried (try) so far.分析 到目前为止,每一种可能的方法都被试过了.
解答 7.has been tried,句子包含时间状语so far"到目前为止",句子应使用现在完成时,其主语means"方法,方式"与try构成被动的关系,因此使用现在完成时的被动语态,故答案为has been tried.
点评 对于单词填空这种题,要分析句子意思,再从结构上和意义上对答案进行确定.
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