问题补充:
Books of this kindwell.
A. sell
B. sells
C. are sold
D. is done
答案:
(答案→)A. sell
B. sells
C. are sold
D. is done
解析:本句意为:这种书很畅销。sell通常用主动结构,而且主语是books,故选A。英语里有些词用主动形式表示被动意义,如sell,read,write,translate,wash,wear,look,cut,keep,feel(摸起来),burn,last,strike等动词与表示行为方式的状语连用时或与情态动词连用时。