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A new technique________, the yields as a whole increased by 20 percent.A、working
A new technique________, the yields as a whole increased by 20 percent.A、working
游客
2023-10-21
86
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问题
A new technique________, the yields as a whole increased by 20 percent.
选项
A、working out
B、having worked out
C、having been worked out
D、to have been worked out
答案
C
解析
研究出一种新技术后,总产量提高了20%。独立主格结构题。句子的主语是the yields,而空格前有一个主语A new technique,跟句子的主语不一致,说明逗号前是独立主格结构。根据语义,新技术已经被研制出来了,所以要用现在分词的完成被动式,所以C项为正确答案。
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