Only the factory yesterday this kind of machines.
A. did we visit; does it produce
B. did we visit; produces
C. we visited; produces
D. we visited; does it produce
网友回答
A. did we visit; does it produce
B. did we visit; produces
(答案→)C. we visited; produces
D. we visited; does it produce
解析：第一空考查定语从句，先行词是the factory，定语从句缺乏宾语，用we visited做定语从句，省略关系代词that/which，第二空不用倒装，因为only+主语时，句子不用倒装，句意是：只有我们昨天参观的工厂才生产这种机器。选C。