问题补充:
As is known to us all, English books of this kind well in middle schools.
A. sell
B. sells
C. is sold
D. are sold
答案:
(答案→)A. sell
B. sells
C. is sold
D. are sold
解析:考查动词主动表示被动和主谓一致的用法:句意:众所周知,这种英语书在中学很畅销。sell这个词可以用主动表示被动,表示书的特点,属性,sell well意思是“畅销”。主语是English books of this kind,谓语是复数,如果是this kind of English books,谓语就是单数,选A。