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The total output of this factory (double)________ since it was put into operatio
The total output of this factory (double)________ since it was put into operatio
游客
2023-09-24
51
管理
问题
The total output of this factory (double)________ since it was put into operation in 2006.
选项
答案
has doubled
解析
根据句子关系可知,空格处应为句子的谓语结构;根据since一词可知,此处应使用现在完成时,故此处应填入has doubled。
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