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专升本
A new technique______, the output as a whole increased by 20 percent.
A new technique______, the output as a whole increased by 20 percent.
admin
2015-09-05
39
问题
A new technique______, the output as a whole increased by 20 percent.
选项
A、working out
B、having worked out
C、to have been worked out
D、having been worked out
答案
D
解析
此题考查独立主格结构。前半句与题中前半句与后半句仅用逗号衔接,没有出现并列连词或从属连词,推测出应选非谓语形式。选项中动词“work out”与其逻辑主语“technique”之间为被动关系,应首先排除A,B,选项;又因分词动作先于主句的谓语动词发生,故选用分词的完成被动时态做原因状语,故D项符合题意。
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本试题收录于:
英语题库普高专升本分类
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英语
普高专升本
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