Question

 The flowers were so lovely that they __________ in no time.

   A. sold         B. had been sold       C. were sold        D. would sell

Answer

 C  根据所提供的情景“The flowers were so lovely”可判断出要用一般过去时,表示过去发生的动作或存在的状态。再根据the flowers与sell的关系可确定用被动语态,表示很快就卖完了。选项A和D都是主动语态,所以是错误的。过去完成时表示一个动作或状态在过去某一时间或动作之前已经完成或结束,也可能是早已完成或结束,即“过去的过去”;也可以指过去的动作延续到过去的某个时刻。所表示的动作发生在“The flowers were so lovely”之前,也是错误的。