When prices are ____(list),you can go to the store with the lowest price.应该添listed.

问题描述:

When prices are ____(list),you can go to the store with the lowest price.应该添listed.
但还是想更好的与正在进行时区别一下

这里肯定是填listed
prices是被人一个一个的列出来的,所以这里是属于被动语态,与现在进行时风牛马不相及及啊.