81. 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

答案是C。这句话什么意思啊？

为了减少他们的库存，意大利葡萄酒商降价了。他们的葡萄酒被降价销售了，并且他们确实做了？库存确实减少啦？

their wines are priced to sell，and they(i.e their wines) do (sell)

请问解释为何说D选项省略了they, 逗号也必须省略?难道说如果看成2个并列的谓语

的话,就只能有and连接,而不能是逗号+and的形式?

(D) are being priced to sell, and have

解释:  omitting the subject they means that the comma should be omitted as

well