A.
1.当sell,read, write, wash,clean, cook, burn, draw, cut, wear等词与well, easily, quickly 等副词连用时,常用主动表被动.
如：The cloth washes well.
The poem reads smoothly.
The book sells well.等等.
2.当sell的主语与它构成主动关系（也就是说主语是该动作的发出者）时用主动：I sell this book to him.我把这本书卖给了他)
当sell的主语与它构成被动关系（也就是说主语是该动作的承受者）时用被动：This book is sold by me.这本书被我卖了.原形sell过去时sold过去分词sold.