题目内容
If
A. had discovered B. had been discovered
C. has discovered D. has been discovered
D
解析:首先判断“what”和“discover”之间为被动关系,排除A和C; 再从整个题干时态(lived, would be)判断是虚拟语气,表示与现在相反,故应选D,表示到目前为止所发现的。.
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题目内容
If
A. had discovered B. had been discovered
C. has discovered D. has been discovered
D
解析:首先判断“what”和“discover”之间为被动关系,排除A和C; 再从整个题干时态(lived, would be)判断是虚拟语气,表示与现在相反,故应选D,表示到目前为止所发现的。.