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A series of attempts ______ , we came to a wonderful solution to the problem.A、h
A series of attempts ______ , we came to a wonderful solution to the problem.A、h
游客
2024-08-04
41
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问题
A series of attempts ______ , we came to a wonderful solution to the problem.
选项
A、had been made
B、were made
C、having made
D、having been made
答案
D
解析
句中现在分词短语作状语,表示动作已经发生,因此用完成形式。例如:Having finished her work,she went home.她干完工作就回家了。题目中句子用的是现在分词的被动形式。
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