看了链接里得所有讨论。大多集中在they的指代问题上，但是为什么没人置疑do是什么东东的省略呢？do既然做they do句子中的谓语动词那么它应该指代前半句话中的谓语动词才对啊，也就是their wines are priced to sell 中的are priced.,怎么会指代不定式to sell呢？

这怎么会叫平行呢？

their wines are priced to sell, and they do

题目贴一下先：

In an effort to reduce their inventories, Italian vintners have cut prices; their wines have been priced to sell. and they are. (A) have been priced to sell, and they are (B) are priced to sell, and they have (C) are priced to sell, and they do (D) are being priced to sell, and have (E) had been priced to sell, and they have