OG 87

gmat740740

87. 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
OG在解释中说A- Th ey are would require selling to complete it,
not sell.
B -Th ey have would require sold to complete it,
not sell
     为什么如果前面是selling,后面就是are?前面是sold,后面就是have?

gotomba

就是保持be动词一致吧。XXX sell/sells good。这个大家都明白吧。

cckjenius

助动词补出原则。
be doing就补be
have done就补have
如果是动词原形就是do

supermanlee

完美解答。。