The two dictionaries recently published __________so well that they are already out of stock.
A、were sold
B、sold
C、sell
D、are sold
【正确答案】：C
【题目解析】：sell这里是系动词（像am, is, are一样）用法。和主系表结构是一样的。用法就是主语+sell+表语，不用被动语态。例如：This book sells well. （这本书卖的很好/这本书很畅销。）原句的意思是“这两本新出版的字典卖得如此的好以至于已经缺货了”。因此我们选择C. sell。
