问题描述：
'The Revealer' is a new machine which is used for detecting buried gold
这句话,我觉得应该这样写“'The Revealer' is a new machine which was used for detecting buried gold.
这句话,我觉得应该这样写“'The Revealer' is a new machine which was used for detecting buried gold.
问题解答：
我来补答展开全文阅读