如题：
In an effort to reduce teir 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
oa：C
我的理解是In an effort to reduce------表明后面的一系列都是围绕这个目的的动作。
逻辑意思可能有三种
一是说跟have cut prices前的一种对比。 另外一种是说cut prices之后得状态描述。 三是正在进行的状态（这种酒正在卖，也就是og解析说为什么A需要are selling to complete it）。
对应一下，这里的核心动词是SELL。因为分号后面的主语是their wines （they）。这里的造句牵扯一个原则，叫helping verb的补出原则
贴一个讨论threadHelping verbs http://forum.chasedream.com/foru ... &fromuid=949695
3) helping verb补出的原则：
The most important rule we need to remember for this question is one of the rules of ellipsis: If you omit a word in a sentence, that word must have already appeared in the sentence.
In this question, the original version, if "un-ellipsed," would look like this: In an effort to reduce their inventories, Italian vintners have cut prices; their wines have been priced to sell, and they are selling.
You will notice that the ellipsed word is selling, but this word does NOT appear in the sentence before.
In the correct answer choice, we use do to substitute sell. Remember, do can be used to replace a verb phrase,
In simple,
... I have. (have verbed)
... I do. (verb)
... I did. (verb past tense)
... I will. (will verb)
... I can. (can verb)
... I could. (could verb)
