The total output of this factory (double)________ since it was put into operatio

游客2023-09-24 55

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。

转载请注明原文地址:https://tihaiku.com/zcyy/3042353.html

相关试题推荐

随机试题

最新回复(0)

Itisnecessarythatthepatient(examine)______carefullybeforetheoperation