Recently, I have experienced constant problems in the computer rooms, so I think it is about time we __________ n

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1. (2017高一下·如东期中) Recently, I have experienced constant problems in the computer rooms, so I think it is about time we __________ new computers.

A . have B . have had C . had D . will have

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高考英语复习专题试卷——虚拟语气