求解答 og87 省略的问题

sunflowerclan

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
我的问题是：为什么B中they have后面省略的不是 have （ priced to sell）呢？
怎么看出来省略的是sell呢？求解答呀

sisichen666

LZ自己先看看这个吧：有问题再po：http://forum.chasedream.com/GMAT_SC/thread-763696-1-1.html