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Marriage was one of the first non-biological factors to be identified as improvi
Marriage was one of the first non-biological factors to be identified as improvi
游客
2023-12-26
47
管理
问题
Marriage was one of the first non-biological factors
to be identified
as improving life expectancy.
选项
A、identifying
B、identified
C、being identified
D、to identify
答案
B
解析
本题重点考查分词意义及用法。画线部分是不定式的被动式,表示“即将被看成是……”,这与整个句子的意思不符。从句子的谓语动词的时态来判断,应该是“已经被看成是……”。四个选项中首先可以排除D,用了不定式,而且没有用被动式。同样可以排除A,它用了现在分词表示“正在进行中”。B和C都表示被动,但C强调的是现在。故选B,过去分词表示“完成和被动”。
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