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A new technique ______ , the gross output increased by 20 percent.

发布日期:2022-07-11

A new technique ______ , the gross output increase...
A

working out

B

having worked out

C

having been worked out

D

to have been worked out

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此试题出现在

全国大学生英语竞赛(NECCS)

系列之四:D类

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