A new technique ______ , the gross output increased by 20 percent. -题库考试答案搜索网

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

单选题

2022-03-02 11:10

A、working out
B、having worked out
C、having been worked out
D、to have been worked out

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正确答案

C

试题解析

句意：因为研制出了一种新技术，所以总产量增加了20%。work out与technique之间是被动关系，所以排除选项A、B。技术研制应发生在产量增加之前，故用ing形式。

标签：全国大学生英语竞赛（NECCS）系列之四：D类

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