问题补充:
This kind of books well and they out last week.
A. sells; were sold
B. is sold; sold
C. sells; sold
D. is sold; were sold
答案:
(答案→)A. sells; were sold
B. is sold; sold
C. sells; sold
D. is sold; were sold
解析:sell本身没有被动语态,而sell out则相当于及物动词,有被动语态,故选A