问题补充:
Those postcards were so lovely that they in no time.
A. sold
B. had been sold
C. were sold
D. have been sold
答案:
A. sold
B. had been sold
(答案→)C. were sold
D. have been sold
解析:句意:这些明信片是如此可爱,以至于他们立刻就被卖光了。从Those postcards were so lovely可知应该是一般过去式,还有postcards和sell是被动关系,用一般过去式的被动,选C。